I connect my general USB joystick to N900 via USB-A to MicroUSB converter. Then i ran the USB hostmode enabler (USB h-e-n) to enumerate and mount this devices. I downloaded Xjoypad (http://members.chello.at/erich.kitzm...wn/xjoypad.zip) for Ubuntu source and recompile it using Maemo SDK into executable. Thats it. I just need to run this executable, run the PSX4All, and my N900 turns into real game console with real game controller instead of using small embedded keyboard.