am a bit tired at the moment, but from the sounds of things, to use that drive, you'll need to wipe it and format it to something that OS1.3 understands, and you have a lot of interesting software already on that drive! eeek!
you can use almost any SCSI drives, but that's already been covered. another idea is to use an Acard Scsi2IDE bridge, then an IDE to compact flash card adapter, and various sizes of compact flash card to act as your hard disk.
i have this arrangement working in both a GVP HD8+, and GVP A530. however, i don't know how the A590 firmware would take to this kind of setup.
workbench 1.3 didn't have a hard disk installer, just copy the contents of the workbench disk and extras disk if you like, to the hard disk when formatted...
something like open a CLI prompt and type
copy df0:#? dh0: all
with your workbench disk in df0:, should cover it and give you a basic workbench on hard disk.
some games like populous2 and knights of the sky had hard disk installers. also usually the bigger games like monkey island, dune2, ledgend of kyrandia etc. otherwise, if the disks are workbench compatable, and you can view their contents, then you can create a drawer and just drag and drop / copy the contents of the disk to the drawer, and run it from there.
most of the time that's all the hard disk install scripts back then did anyway, plus maybe create an assign line in your s:startup-sequence to have a pretend disk volume that just pointed to the drawer on your hard disk that the game was installed in.
a line something like
assign kots1: dh1:games/kots
assign kots2: dh1:games/kots
so that when knights of the sky asked for a file from a disk or volume named kots1: or kots2: it got pointed to dh1:games/kots drawer.
however, most games with copy protection, or track loaders with funky filesystems won't be directly hard disk compatible.
however this can be got round in some cases with something called whdload, which was built specificly to make non hard disk compatible games run from hard disk, however this requires OS2.0+, and preferably a 68020 and about 2 to 4+ meg ram for a comfortable experience
enjoy and good luck
A590... god i wanted one of these so bad back in the day
