Hmm, I was under the impression that NS6.01 and 6.0 didn't work at all!
Having said that, I'm in fact writing this message now with Netscape 6.01
under Windows XP Home Edition. It's been running for just over half an
hour and this buggy old browser hasn't even crashed out on me yet!
The only problem here is that the User Agent string incorrectly reports it
as running on Windows NT5.0 (Win2K) instead of Windows NT5.1 (WinXP),
so technically, NS6.01 does work on Windows XP, it's "slightly" incompatible.
UserAgent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; m18) Gecko/20010131 Netscape6/6.01