Running FS-UAE shouldn't be this difficult. The amiga model doesn't really matter, just select A1200 if that doesn't work then try A500. When the machine boots if you see a white screen with a hand holding a blue disk, you have an older kickstart rom image (1.x - it will display the exact Rev number on screen). From there you can press F12 (you might need to switch exposé off in the Mac OSX settings) and pop an ADF image into the virtual floppy and go!
