You cant really give an answer, there might be, until someone finds a way currently the answer is "No".
The chances are there will be a any-region umd booter much like dvdregionx for ps2 because of the hybrid-game/movie umds (which will probably require the latest firmware).
Edit:
It seems that Humma's new UMD emulator would work
http://www.psp-spot.com/forums/index.php?showtopic=3382