Well it probably isn't possible...I'm just wishing it were.

Now I've not been around code in decades, but my guess is that there is at least a video driver of some sort that is specifically setup to drive the 320x320 panel. WinMo and WinCE don't have much in the way of plug & play so images built for the phones are very specific to the hardware in that phone. So there probably isn't a video driver that supports any other resolution than what the 750 ships to make the OS footprint as small as possible. I could be wrong on all of this since I haven't much of a clue how WinMo works.