there is modules like the cheat devices for gta lcs and gta vcs there is also a music module that will allow u to play music anywhere in the xmb (main menu thingy) and also there is another music module *comes in the same download pack thingy* and that will allow u to play any umd and iso with music playing there is going to be more i could tell u that and there already is more like the cwcheat prx (i have this one it works great)
the list goes on.......... just look for them at qj or something

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