You really ought to check for an update of those drivers. Really doesn't sound like it is directly related to Morpheus or WinXP. I've got plenty of Gnutella clients on my WinXP system (LimeWire, BearShare, ToadNode, Gnutella, Gnotella, Swapper, PEERanha, Morpheus PE, Gnucleus, my own) and all work without crashing WinXP.

Also, be careful about drivers that are "pre-release", "beta", unsigned or made for WinNT/Win2K.

-- Mike