Hi there, first time poster here.
What seems to be the problem with the adfs Oggie made and upped to archive.org ?
I've successfully installed the game to four floppy disks (adfs) as well as HDF from his dumps and it seems to run fine using an A500 KS1.3 Workbench 1.3 setup.
It's true WHDLoad quits with an "unsupported or damaged files" message, but that's not unusual if the slave only supports the PAL version.
I'll pass the NTSC adfs along to Psygore and see what he has to say about it.
Anyway, try this in WinUAE.
Use A500 quickstart, boot from a Workbench 1.3 disk in DF0 and add this HDF as DH0.
Start the game from ULTIMA6 icon.
Thanks for sharing the game.