IGN have done a great hands on of the game 50 Cent: Bulletproof which is coming soon to PSP, heres an excerpt:
The PSP version of Bulletproof contains all of the videos and tracks that the console version has, but you'll also find an extra 40+ minute behind-the scenes documentary with G-Unit. It takes a look at their every day on goings and not necessarily anything directly tied to the game, so 50 Cent and G-Unit fans will definitely want to see that.
50 Cent: Bulletproof is currently scheduled for release sometime later this year, so check back for more info soon as the game is scheduled to make an appearance at E3 next month.