What I did before I got CDs and networking on my Amiga is download the ADF's put them in a zip file and then used a split package to split the zip file into seperate files small enough to fit on 720kb disks, then I used cross dos to read the disks on the amiga put them on the harddrive and join them into the zip.
Unzipped it then used ADF2Disk to convert the ADFs back to Amiga Floppy!
Its a long process but it was worth it in the end.
A CD drive made things easier and networking made it even easier. If you dont want to upgrade your A600 though Id say this is the best method for you
