What is the best way to add a dynamic static route?

I am trying to find a way of automatically adding a static route for a dynamic (VPN) interface. The VPN interface sits on a 192.XXX.XXX.XXX subnet and the physical interface resides in a 10.XXX.XXX.XXX subnet.

These are WindowsXP clients.

We need all traffic to go down the VPN inferface so a desired route of:

10.XXX.XXX.0 mask 255.255.255.0 inteface 192.XXX.XXX.XXX

The VPN interface is a dynamic IP and will have no permanent lease assignments.

What’s the best way to handle this? I would ultimately want as little end user intervention as possible since the majority of Windows clients are severely Policied from using most Windows admin functions.

Any assistance would be greatly appreciated.