I am running a brand new laptop that came from Toshiba with XP-Home already factory installed. It had IE-5.x also installed, but NO version of any Netscape product. I downloaded the upgrade to IE-6.0.26 myself from Mfst and then downloaded COMMUNICATOR 4.79 from the Netscape site. I wanted the Communicator for the mail/new reader applet only .
I use IE for all web browsing and Communicator for all email/news reading. This setup works just fine on Win-XP/Home on my laptop. The laptop is a P-3 @ 1.1 mhtz with 256 sdram.
I think the big reason I have such a stable system is that it was setup at the factory by Toshiba and the Bios and other items have been "tuned" for XP "approved/certified" software.
I only run software that is XP "certified". If you are trying to upgrade from an older version of Windows (ie-2kPro/98/Me) then I think you should consider a completely clean install of XPand a total re-build with a new version of your Bios from the PC maker set up for XP. Remember - XP needs "xp" level drivers for almost everything so download all those drivers ASAP.
-dAAvid