In this case as Nikon advise, you do have to uninstall 2.5 first and run regsweep before installing ver 3.
I did this with Win98-nearly-SE (Win98 non-SE with all service packs) and had no probs. Julian At 17:19 20/12/01, you wrote: >I am upgrading the NikonScan software for my LS2000 from version >2.5 to 3.1. I have firmware version 1.31. > >Are there any special procedures/gotchas/tricks that I should be aware >of as I go about upgrading the S/W? I have Win98 SE. > >Thanks very much, >Gaspar