I can't help directly Wolf, but at one point i remember having terrible problems with Scope Window drawing speeds in XP on an Nforce2 A7N8X deluxe running an Nvidea FX-5200 (128mb) feeding 2 19" CRT's. The system was not installed as Standard PC. In a bid to improve the performance we put in more Ram, which definately helps XP's allround performance, but didn't improve the Scope window drawing performance noticably. It was really bugging us & we were very close to going for a new mobo etc. Eventually i thought sod it, lets get a new 7200 rpm hard disk with 16 meg cache & install XP on that for comparison. So we did just that. Installed XP in Standard PC mode, installed essential drivers & went by the book, you know switching off all the frilly fluffy graphics in XP & generally optimizing the running of the XP OS. After installing Scope, we instantly noticed a very big difference in the drawing/redraw speed of Scope windows accross the screens. It was now very usable indeed. Only problem is
we didn't methodically make the changes one by one, so i can't verify if it was the faster HD with cache or the switch to Standard PC or one of the XP optimizations If i'm not mistaken, I switched off all networking services in XP & all the other fluff services that we weren't going to need on this 'closed' DAW (no Lan, no Net 
Worked a treat
