what you are experiencing has NOTHING to do with XP and its server service...you have a browser contention issue.
there are two things you must do. on your workstations:
open the registry, goto:
\hkey_local_machine\system\currentcontrolset\servi ces\browser\parameters
there are two subkeys of interest, make sure they are set to the following:
IsDomainMaster set to FALSE
MaintainServerList set to AUTO (in some instances you might need to set this to NO, but try it w/the AUTO setting first)
on your DC's(s), make sure those same registry settings are:
IsDomainMaster set to TRUE (non-DC's are recommended to be set to NO)
MaintainServerList set to YES
reboot the servers first, then do the workstations.
then expect my consultant bill next week.