I think I found a bug. With the Mediaplayer playing a .wmv i couldn't load any skins. The car would just remain with the default skin and it seems like the dds surfaces and shadows start to "clip", and it stutters when you try to turn the car around with the mouse

just tried it again just after starting my pc. Opened a video in Mediaplyaer 11 (now an .avi file), opened Skinviewer, chose a custom hi-res skin (the default ones work oddly enough) and the above stated happened again

Not a big think, just found it when making a skin from a race video, but maybe its the reason for some errors in the sim itself