Help !! PSP Media Player Homebrew and other apps !

Hi guys !
many thanks for your useful previous answers !!;)
Here I have 2 questions :
1st : i have 4.01 m33-2 CFW and want to install PSP Media Player ((

Code:

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http://www.psp-hacks.com/file/153

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)) .in zip file we see this 2 folders "PMP and PMP%" now tell me what i have to do !:D ((if u know better player tell me ))

2nd : this is about uninstalling Homebrews! guide me to this . for example i install psardumper and popsloader to psp ; now how can i uninstall.how can i return psp to its first mode before installing Homebrews ! i want to completely recover the psp from installed Homebrews !
is downgrade or upgrade effective to uninstall all Homebrews? or reinstall current CFW ? or it has an easier way to uninstall !

Best Regards for u men

Uninstall, just erase the folders

install PSP Media Player put both folders on the ms0:/PSP/GAME150 folder, but it will only work on a phat psp with the 1.50 kernel addon (as this homebrew was made for the 1.50 kernel)