There is a small programm named GDI++ (google it), which replaces the complete cleartype system with an own font smoothing system, 
screenshot: 
http://savouryspacemonkey.deviantart.com/art/Clean-138670068i've tested it, and it works very fine. some fonts are rendered very nice. 
but i did not find the perfect settings for everything yet. so i deactivated it again..
maybe you'll find the best way.