how do i play custem soundtracks on my psp (gta)?

Answer 1

Please chosse me for best answer here is what you need to do to get customtrack to play while you playing GTA.
:
http://psp.ign.com/articles/662/662466p1.html First download that PSP music converter then make a folder named ULUS10041CUSTOMTRACKS on the savedata folder then after you converted the music put it it that folder and your done.