Oh,
External floppy, you could put KS 1.0 in an external floppy and it would boot, as long as there was nothing in the internal floppy in the A1000, if there was a disk in the internal floppy it would look there, if it was looking for KS and it wasn't in the internal it would search the externals. At least that was how it worked on my A1000. I had three external floppies. Maybe my A1000 was weird since I had so much into it.
smerf
Yep, he's not trying to boot kickstart from the external floppy. He's trying to boot disks from the external floppy. It would seem KS 2+ is required unless you do a HW mod to your system.