Those free PSP thems is only applicable CXMB 3.71, 3.90 and 4.01.CXMB is a plugin for the PSP will help to install custom themes on your PSP.To install you need a PSP with one of these installed custom firmware: 3.90M33, 3.71M33 or 4.01M33.
1.Download file which suits firmware: CXMB 3.71 M33, CXMB 3.90 M33 or 4.01 M33 CXMB.And PRX files you need: PRX PRX 3.71 and 3.90.
CXMB 2.Extract that archive, locate and enter the folder "CXMB_FULL" copy folder "cxmb" the root of memory stick (ms0 :/"). And also copy the folder "seplugins" in the root. (For those who already have the file "vsh.txt" in "seplugins", open the file and add the line "ms0: / cxmb / cxmb.prx" save and close.)
3. Extract the archive corresponding to your firmware and move the three files in "ms0: / cxmb / support" (only available in firmware version 3.71 M33 and 3.90 M33).
Add to your themes in "ms0: / PSP / THEME.After applying a theme PSP automatically gives his restart!
We advise you to avoid brick of the console is indicated not rush to do experiments on the console. Document your net as well to avoid trouble. For PSP Slim owners to know clearly that they have Pandora's Battery is a battery that basically service that will help you put any custom firmware (be careful not supported by version 1.50 PSP Slim). If Pandora's Batery can be made from a battery only from the PSP Fat. The transformation from a normal battery in the battery service is reversible and is made from soft. Is she needed only the first time to decode it. Then the battery is no longer required for service. If you have a friend you can use the Fat PSP's battery without any problems.that they have Pandora's Battery is a battery that basically service that will help you put any custom firmware (be careful not supported by version 1.50 PSP Slim).