On newer A1200s you can use PC floppies by simply rewiring your floppy cable (I believe it will only work on A1200 models that were fitted with PC floppy disks)
I can't remember the exact wiring you have to use, but its a case of swaping 3-4 pins and it will work

I have a cable I made up and the diagram somewhere, I'll dig it out if peeps are interested...