That would make sense as Caps Lock is in the same place as Ctrl on the Amiga keyboard. Ctrl + Windows + Windows would actually be a pain to press with the left windows and Ctrl so close together.
Anyway, I will have to try it when I plug the EZ-Key back in, thanks.
Incidentally, that reset mod above - can anyone confirm thats a safe mod and wont blow up the Amiga over time?