This mod done by Blizzrad of AcidMods lets you use your aging wired DualShock controller and hook it up to your PSP. The controller had its connector replaced for a much smaller one to elegantly fit in with the PSPs slim build. The mod also takes full use of the controller's second analog stick and extra shoulder buttons. The only commands not controlled by the DualShock are backlight and volume control.
If you were one of those looking for dual analog control, then you may remember this older mod which added a second analog nub. This new one would probably be more comfortable to play with than that. Anyway, the only problem with this mod is that it's probably too difficult to do on your own. So don't try it. Instead, just see the thing in action in the clip after the break. Also check out AcidMods for more pics of Blizzrad's hard work.
So why are devs making games that would work better with dual analogues?
Love my PSP but I really wish there was a 2nd analogue nub to control the camera in 3rd person games, to move and look in FPS. And that it was more than a nub. Maybe the new PSP will have something like an IBM nipple mouse with a top on it.
Couldn't Sony implement linking a sixaxis to the PSP using a miniUSB to miniUSB cable? This would solve remote play with PS3 games as far as controller issues go...