After some playing around with my 120MB *MemoryStick Duo* without luck, I came to the conclusion, that you **really need
a *Pro Duo*** for this thing to work. The limit for sticks up to 2GB is gone. You can use any stick - mine was a *8GB
MemoryStick Pro Duo Mark 2*. Be sure to backup all files first.
Using *PSPGrader* and *Rain's UltraLite MMS Maker* didn't work in the first place (tried both with the *Format
MemoryStick* option). The latter one gave the *["IPL failed to inject"](http://www.psp-hacks.com/forums/archive/index.php/t-232186.html)*
error. I then used the `mspformat.exe` from the *TotalNewbi Installer* to format the USB stick. After that, using
*Rain's* (without the *Format* option checked) finally worked and I had a *Magic MemoryStick*.
Using the Magic MemoryStick
---------------------------
To make the PSP load the custom file from the MemoryStick, you have two options:
1. without the MemoryStick in the slot and without AC adapter plugged, put the Pandora battery into
1. the green *Power*-LED should turn on, anything other stays off
1. hold the <kbd>L</kbd> shoulder button while inserting the MMS
1. now the *WIFI*- and *M*-LEDs should flicker and boot the file
you can also do it the other way around:
1. without AC adapter plugged and without battery inserted, put the MMS into the slot
1. hold the <kbd>L</kbd> shoulder button while inserting the Pandora battery
1. the green *Power*-LED should turn on and the *WLAN*- and *M*-LEDs should start to flicker
If only the green *Power*-LED comes on with none of the other LEDs flickering, your Magic MemoryStick mostly doesn't
work. In some rare cases you might have a PSP with the newer mainboard (TA-88v3). Find out [here](http://www.dcemu.co.uk/vbulletin/showthread.php?t=183671).
You might also try [this](http://www.qj.net/psp/homebrew-applications/dark-alex-releases-ta-088v3-identifier-find-out-if-your-psp-is-unhackable.html).
* [Team GEN Forums](http://www.pspgen.com/forums/) (mostly French, but one is English)
* [List of all CFWs incl. some background info](http://alek.dark-alex.org/pspwiki/index.php/Custom_Firmwares)
After using the MMS and selecting the first option *Flash install 5.00M33-4*, you will have *Dark Alex*'s firmware on
your PSP. Upgrade it to the latest version by following the steps [here](http://www.atmaxplorer.com/2008/10/psp-custom-firmware-500-m33-is-released/2/).
Just download the *5.00 M33-5*, install it as described there then do the same with the *5.00 M33-6*.
Now you have the choice of switching over to *Team GEN*'s firmware which should support all the latest games. To do
this, use the *XGen Updater* as described [here](http://www.atmaxplorer.com/2009/12/install-psp-custom-firmware-5-50-gen-d3/).
The firmware file is also available [here](http://www.psp-hacks.com/file/1873). Newer versions can then be found in the
Downloads section of [psp-hacks.com](http://www.psp-hacks.com/category/39).
<p><divclass="noteimportant"markdown="1">
**ATTENTION!** If you have problems with corrupted savegames or UMD titles not starting, please use the [5.50GEN-D2 Quick Updater](http://dl.qj.net/psp/homebrew-applications/cfw-550gen-d2-quick-updater.html)
to downgrade to that version until 5.50GEN-D4 is out. You might also try [these steps](http://www.pspgen.com/forums/interesting-tidbit-for-those-haveing-trouble-t192838.html)
before doing the downgrade.
If you don't have a backup of your saves, try [this](http://www.maxconsole.net/forums/showpost.php?s=a3670fea1205db04755ba1c6f42f65aa&p=1122026&postcount=3)
