I just flashed Psyki4 ROM to my Sprint CDMA Touch Pro. It's VERY fast, and so far has been perfectly stable with many programs running at once. VNC Viewer is in the ROM, under the Start, Internet folder. I don't know how to get you the .CAB, but here's the link for the thread:
http://forum.ppcgeeks.com/showthread.php?t=66993
and for the ROM:
http://psykiroms.com/roms/Psyki4-090929.rar
perhaps ask psyki where to find it. Great ROM, you could just flash it, and be good to go.