OK, so far I figured out a little bit here. I copied all the files to my DOSBox mounted folder renamed to SSTEEL now. I put in 'imgmount d /ssteel/ssteel.gog -t iso -fs iso'. The default conf file has ssteel.inst listen instead of *.gog, but the .inst file never mounted for me. When I mount the .gog, it appears to mount it now. It comes up 'MSCDEX installed. Drive D is mounted as [DOSbox folder]/ssteel/ssteel.gog.' I run ssteel.exe and it looks like it's loading fine but then it stops and says 'world1.pol' not found. That's as far I have gotten.