Yeah, same result.
It's really weird. Everything I'm searching on RAW files .NEF in particular (Nikon Electronic Format) not working properly in Xp, is about the thumbnails/previews not working, or not being able to view them in the standard windows viewer.
In my case, the .NEF files won't show up at all. I can see the .JPG thumbnails, strangely listed twice, but not the .NEF file.
If I import them in through PS, then they can be browsed in windows, and the thumbnails even work, but a quick drag-n-drop from the camera just won't show them at all.