Although Intel macs don’t support classic, SheepShaver may be a way to run older software. I’ve installed an x86 build and I finally found a working ROM image, but it won’t boot my 9.2 CD, which is the oldest one I can find. Tomorrow I’ll look for a 9.0 CD which it should be able to boot.
UPDATE: I was able to get it running using the Software Install CD from my old G4 minitower. I posted the full details here.
Have you tried PearPC? I think some people have gotten it to compile on Intel Macs.
No, I forgot about PearPC. I did manage to get SheepShaver working using a PowerMac G4 software restore disk. I'll post the full details at macmegasite later.
<img src="http://static.flickr.com/38/97974860_d0e6dcc36a_m.jpg" width="240" height="150" alt="Classic Desktop" />