3.40 OE-A is old update to 3.52 M33 from here
I guarantee you this is the easiest and safest 3.40 oe-A installation guide on the net . 3.40 oe –A is a custom firmware by dark alex that is basically like a 1.5 psp with 3.40 compatibility . You can run psp iso’s , cso’s (upto 3.40 compatibility) , psx games , homebrews , and even devhook etc. This installation requires flashing so use at your own risk . It really safe , If you follow the instructions you wont have any problems . See If this video helps .
3.40 oe – A installation
For installing this you need a 1.5 psp or a psp with older version of custom firmware from 2.71 SE-A to 3.30 OE-A (if u have custom firmware make sure you are on 1.5 kernel mode , need help see here .)
1) Format your psp (go to system settings and choose format memorystick) and connect it to your PC . Make sure your battery is 100% full
2) Download the 3.40 oe-A easy installation (compiled by me) from here (34 MB) or torrent link , torrent link needs utorrent or similar software (please seed)
3) Open it with WinRAR if you don’t have WinRar download it from here
4) So open with Winrar and copy the PSP folder to the root of your memory stick , If it asks you whether it can over write click on “YES”
5) Disconnect the psp from the PC , scroll to the game menu > memory stick and start the OE UpdateMaker
6) Some white text will come up , it will take about 3 minutes if you are using memory stick duo pro and it will return to the XMB home . Reconnect your psp to the PC.
7) There will now be a new file in PSP/GAME/OEUPDATEMAKER, named "DATA.DXAR". If it has the size of zero bytes, then format the psp and redo it .
8) Go to PSP/GAME/OEUPDATEMAKER, and move the newly created DATA.DXAR into: X:\PSP\GAME\340oeflasher . Then disconnect the psp from the PC .
9) Here comes the flashing part MAKE SURE THERE IS NO UMD IN YOUR PSP REMOVE IT IF THERE IS .
10) Make sure your battery is at least 75% (100% recommended) a. scroll to the Game menu > memory stick and start the application named 3.40 OE Firmware install.
11) It will display some pink text, press X, and it will start flashing your psp. When it finishes, you will be prompted to manually restart your PSP. And your done you now have a 3.40 0e custom firmware . It has replaced your 1.5 / older custom firmware so you can FORMAT the psp or delete the files .I recommend having 1.5 recovery on custom firmware download it from here
ALSO SEE 3.40 custom firmware users guide to know how to play iso's , cso's , homebrews etc from here . Here is a video of how you can access the recovery menu click here .
If you have any doubts see the FAQ here before emailing me (see homepage)
Stumble It!
3.40 oe custom firmware installation
Labels: applications, custom firmware, downloads, emulator, homebrew, iso, oe, PSP, software, tutorials
Devhook 0.52 tutorial with 3.03 emulation tutorial.
ITS RECOMMENDED THAT YOU INSTALL CUSTOM FIRMWARE INSTEAD SEE MY POST 3.40 oe custom firmware installation
To be installed in 1.5 f/w PSP
HOW DO I PLAY ISO's ON MY 1.5 FIRMWARE PSP
Here's a guide how to play iso's on your 1.5 firmware psp . Note you need atleast 512mb to play an iso best buy 2GB , 4GB or 8GB memory stick ...
Where do i download psp iso's from
DISCLAIMER : PLEASE TRY THIS AT YOUR OWN RISK , I AM NOT RESPONSIBLE FOR THE CONTENT DOWNLOADED , It is not legally possible to download psp iso's unless you have the original UMD (in which case you are allowed a back up viz. ISO) , So it is understood that you own a UMD and for some reason need to download the iso as a backup , UMD damage or any other ethical reason .If you are going to proceed these steps to illegaly download game please leave the post immediately .
First download a torrent client like utorrent look here .
Next go to a website like http://www.torrentz.com/ just type psp followed by the name of the game . eg PSP Fifa street 2 and search for it.
Just download the torrent and open it .
Utorrent will then download the iso /cso .
after the download is completed put the iso in the ISO folder in the root of your memory stick
play it with an emulator like devhook read how to play iso/cso on 1.5 PSP
How to Downgrade a 2.71 ,2.7. 2.6 , 2.5 or lower psp to 1.5
I have personally tried this downgrader 5 times and all resulting in a complete success. I do not guarantee you that you shall be successful as me . Please try this AT YOUR OWN RISK. I will give you 99% success chance if you do EXACTLY WHAT I SAY. But I say let's get it done , it worked for me 5 times and I doubt you will have any problems (hopefully) if you do what i say
: D (trust me).
NOTE: If you have a TA-082 psp , to check click here (your UMD tray will be green in colour) do not attempt this downgrading . Instead do this how to play games on psp without downgrading . I repeat do not attempt this if you have a TA-082 modchip (rare)
REQUIRMENTS:
1) You will need WinRaR for extracting download it from here
2)Your PSP must be 100% charged , you will also need a psp USB cable and a FORMATED memory stick which is atleast more than 32 MB.
To check whats your f/w (firmware) version go to "system settings " on the main menu > choose "system information" > and see the system software
3) If your firmware is 2.71 skip this step , if its lower than that download this here
4)Download the DOWNGRADER from here
5)Download the DOWNDATER file from here
OK LET'S GET EM DONE
Downgrading to 1.5
1)If you are on 2.71 Skip this step . If you're on a lower one then go into PSP > GAME and create a new folder called UPDATE. Put the EBOOT.PBP file from STEP (3)in there. Restart your PSP and update it as normal via the GAME menu (Just click on the update icon on the folder and follow the instructions). Delete the data when you're done.
2) Open up the zipped Downgrader file from step (4) . Click on MS_ROOT and you will see the following: PSP , d.bin , LEEME.TXT , README.TXT Copy these onto you PSP's root (the first screen you see when you go into it in USB mode eg removable disk (H:) or (I:) or (J:). If it tells you 'there's already a folder called PSP' or something overwrite it - Just click on "OK".
3) Take the unzipped DOWNDATER folder from STEP (5) and put it in the same place, your PSP's root. your psp should have these things
PSP (folder) <- very important DOWNDATER (folder) <- very important d.bin <- you should have this MP_ROOT (folder) <- it's not important that you have this . LEEME.TXT <- it's not important that you have this README.TXT <- it's not important that you have this MEMSTICK.IND and MSTK_PRO.IND <- Not important that you have this your psp should look like this
then RECHECK WHAT YOU HAVE DONE again and again
4) SEE that your psp is full charged , Remove the UMD disk (if any) and Recheck the steps .
5) See this video before doing it here or here (alt. link) it helps alot.
6) Disconnect your psp fom the PC , restart it and go to photos (A small trick that always works for me is switch on your psp scrool to settings then scrool back to photos and click on it as fast as you can .) If it gets stuck just hold the power till it switches off or remove the battery (seriously chill don't worry this is normal ) . After a few attempts your whole screen will turn red (just like the video ) just leave it. It took me 7 attempts for the first time to turn the whole screen red , after about 2 minutes the psp will automatically switch off just leave it alone.
7) Wait for about 1 minute before switching your psp back on. If everything has gone well you will see a crazy blue screen (like the one below) , just press circle . CONGRATS YOU SUCCESSFULY DOWNGRADED YOUR PSP (woo-hoo!) (read below)

YAAAA... See I told you so :D works every time. It will ask you for date and time and stuff after which you can go to system settings and check your 1.5 f/w on your system information . FORMAT YOUR PSP AFTER THIS .
TO PLAY ISO's ON YOU 1.5 PSP :) click here
You can email this post to your friends just click on the email icon below
Video converter for PSP ...MP4 conversion
Rapiz:
Psp video 9:


