I found some more XP tweaks online and most of them match up witht he OPUS tweaks. However This one I found really makes me wonder. Is this really true?

make sure hardware graphics acceleration is on FULL. this takes some
load off your processor (right-click on the desktop and select 'properties'
from the menu. now click on 'settings' then 'advanced' then
'troubleshooting' now set the 'hardware acceleration' slider up to full).