Hi,
This comes up a lot - Windows XP
will allow you to format a 720Kb disk, just not from the formatting GUI.
To do it, open a command prompt (a.k.a DOS prompt) and type the following:
format a: /t:80 /n:9Another XP-based program that might be of interest regarding all sorts of floppy formats is
OmniFlop, which will allow your PC's disk controller to read/write a multitude of disks (including Atari ST, various CP/Ms, Sinclair, Acorn/BBC, etc). It won't read/write Amiga disks due to PC disk controller hardware (you'll need a Catweasel for that) but it's still very useful and it's free.
- Ali