That was it! Managed to remove NetMeeting, and DXDIAG reports all acceleration Enabled. Re-installed WinUAE, detected pixel format, it found my resolutions, I selected 800x600x32 50Hz PAL with Vsync, and everything flows SMOOTHLY with no visual defects whatsoever!
Found how to remove NetMeeting here:
http://gemal.dk/blog/2003/09/03/real...ve_netmeeting/
I saved the page to my harddisk, since this page was the ONLY solution that properly removed it in Win2k.
I'm smiling from ear to ear now
*happy sigh* I'm sorry for ever thinking there was something wrong with your superb program Toni...