If you're using Vista or 7, you can find the other sig.bin files in C:\ProgramData\Stardock. I'm not sure about XP but
you can try putting in %ALLUSERPROFILE%\Stardock in the run command.
On a side note, can u use the backed up sig.bin files to activate the products offline after you a make a clean install of
Windows? I thought they were unique to each system meaning they become unusable when you make a clean install.
Or when you said Reload/Reimage, you meant reinstalling/repairing Windows or restoring from a backed up image of
the system drive in which cases the SID would be the same?