I'm gearing this question towards Windows 2000 but I would also like to know in general, is there any difference between a disk purchased from a retailer with a service pack already on it and a slipstreamed service pack? I have a couple 2000 disk images I ripped a long time ago. Not sure whether I ripped them from the same disk or not. One is obviously slip-streamed as it contains a cdromsp4.tst file. I can't seem to find out whether the other has any service packs and would appreciate advice on how to find out. Unfortunately, the physical disks are tucked away in my attic somewhere. Is there anyway to tell what sp is on this image? If it had a sp from the factory, would it have a corresponding tst file? lastly, is there any advantage to having a disk with the sp from the factory (for 2000 and in general). Thanks!