me dragging up this thread again.
This looked really nice. Here is my experience, is cannot compare to what you have, but it relates to "gaming on the UX".
Back then I always wanted a PSP, but I also wanted a gamepad for the PC so I can sit back and play my favorite game without using the keyboard, I can't buy both, so I got a PSP in the end.
Then I found online a homebrew software called PSPDisp, it basically converts your PSP to a PC monitor, plus the software has a semi-joystick function, configuring the PSP buttons corresponding the keyboard.
I give this software a try, and I was happy with it. I liked PSP's handling, and sitting back using my PSP to play what I liked to play is definitely a nice treat. You can use the USB cable, which is a traditional joystick experience, or using WIFI, which is a wireless controller experience. You can also use it as a remote monitor as long as you have WIFI.
I can do the same on the UX since it can run Windows, the troubling part is configuring the buttons, you need to create a text file using a specific template, and the key mapping rule is very strict, if you make a tiny mistake in the text file, nothing will work. Since this uses keyboard as commands and not an actual joystick, it can be very flexible in configuring the buttons.