How do games utilize the R2 and L2 buttons on a PSP?
One game in particular that comes to mind is Xenogears, it was originally on the PS One but can be played on PSP. While you're exploring the world you can quickly get in and out of your gear by pushing these 2 buttons simultaneously. But when I use the buttons on top of the PSP, they act as R1 and L1, thus it just spins my map around acting like it would normally on the PS One version.
I know there are other games that require you to use the R2 and L2 buttons, and these games are available on both the PS One and PSP systems. So how could you use these buttons to establish normal gameplay?