Obviously you DOS guys don't know how to 'Think Different'.
The software you need to use any Windows program on a MAC is Virtual PC. This is a shell program that uses software to emulate an intel processor. It comes with Windows 98 or XP, depending on the version. Connectix has been making this program for about five years, updating it for MAC OS and processor upgrades the whole way. In other words, support for this product won't go away.
I've been using version 2.0 for about two years, and it is somewhat slower than a comparable Pentium III box, but with a 600mHz G3 (or G4?) chip in your iMac, version 4.0 should be pretty speedy. Check out Connectix' web site
www.connectix.com to see what they say is most compatible with your iMac, then go to eBay to see what folks are getting for it. I got my version for about $75.