Well, thanks for the quick reply. The problem is:
I have so many snare samples called "snare02.wav" that I don't know anymore which is the right one. If Reason could show me the original path, I could search and replace it by myself. If just hit scan, Reason takes the first "snare02.wav" it can find. Which makes no sense at all.
If I had my old system, Reason would automatically find the right/original sample. So the path has to be stored somewhere in the rns-file. I can not understand why the Propellerhead guys do not make that info visible?