I managed to get AGS 3.0 going on my A600GS by doing the following:
1. Download the AGS Classic AGA 3.0 - SCSI/Kickstart fix version (I couldn't get it working with the non-fix version)
2. Unzip the archive, rename the .img file to .hdf and copy to a USB stick
3. Boot the A600GS to the menu
4. Create a Custom Setup as A4000 (I used the KS 3.2 ROM), 2MB Chip + 8MB Fast memory
5. Add the AGS .hdf file on the USB to the setup - note that for me this took about 30 minutes to copy ...
6. Save
My Custom Setup stopped working after I'd tweaked the settings and resaved (KS no disk screen on startup). Deleting and reloading the hdf got it working again.
