Alt255 - I'm not trying to show anyone up here, I just think that it depends on how the PC was put together.
I've built 2 such PCs, one that my girlfriend uses every day at college and one I have lying around the house to prove to techie doubters that it CAN be done!
The only "tweak" I really used was to configure the swap file to be set at 50Mb min and max, to reduce fragmentation.
I've tried it on other 486-based PCs with varying results!
Maybe the secret of this PC lies in the construction - it has a daughterboard riser, on which the processor sits, and the processor itself is surrounded with cache chips. Maybe because the cache is on the same bus as the processor it runs at the same, or, at least, a very high speed. At 66Mhz, it's quicker than the slowest pentiums
We timed it shutting down at 6 seconds. Starting up and using Office apps (Word and Excel - let's be fair!), you couldn't tell it apart from a DELL Optiplex GN1 with a 200Mhz processor.
The benchmark results tell a totally different story, but the actual usability is fine.
As I said above, much of what W9x runs on and won't run on is pot luck. Remember the original specs for w95? A 386DX with 4Mb RAM :-D
I don't think (but I might well be wrong) that the SUWIN error message means that there is not enough RAM, but rather not enough conventional memory (first 640k).
I'll do an FAQ on installing operating systems, though - good idea, Thanks!