New WDDM (LDDM) Drivers
ATI have released some official drivers for Vista build 5308 which can be found here:
ATI Catalyst Build 5308 WDDM Drivers
LaptopVideo2go has posted some newer NVIDIA LDDM’s which are much better than the 87.15 and they NATIVELY support mobile GPU’s. They can be found here:
http://www.laptopvideo2go.com/forum/index.php?showtopic=9073
Enjoy!