I see the Dude is reporting all XP machines as Software= Windows 2000 V. 5.1? snmp is on all mahines and mostly reporting cortect.
The Dude is not interpreting anything, that is literally what XP is reporting through SNMP. I have it here too.
Windows 2000 is NT version 5.0, MS obviously regards XP just as a minor upgrade to XP.
Well, anyway, you’d have to ask Microsoft why they state XP as being Win2000 5.1 over SNMP.