@hookuk:
Another way for you might be to get an old 2.5" laptop drive (less than 2Gb), and an adaptor for your PC, then use WinUAE to copy a load of ADFs to it in bulk (and install Workbench, etc).
Then, once done, you can plug the drive into your A600 and have a system ready to go to start writing the disk images out to real floppies.
As far as getting stuff on to the A600 and your chicken and egg situation goes, have a look at
ADF Sender Terminal as this'll let you get basic RS232-based communication up and running between your PC and Amiga with a minimal amount of software on the Amiga side of things (Workbench on its own and/or Amiga BASIC).
- Ali