Wyse is using a tool called Neutron to sync the time. You can simply edit the neutron.ini file in the program directory to add your own time servers.
To use the native Windows service you have to make some registry changes as the Windows service is only syncing the time as long as at least the date is still correct.
- start Regedit
- change the value of HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesW32TimeConfigMaxNegPhaseCorrection to "ffffffff"
- change the value of HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesW32TimeConfigMaxPosPhaseCorrection to "ffffffff"
- copy the file w32tm.exe from your Windows XP Pro SP2 PC to the local folder Windowssystem32
- open cmd
- type "w32tm /config /manualpeerlist:"your timeserver here"
- type "w32tm /update
Make sure the Write Filter is disabled while doing this!