outlook mst link with gpo

[nandak7]

Our client computers have office 2000 / office 2003 preinstalled and we manually configured outlook for every user. Now we are moving to active directory and group policy and planning to join all the computers to the domain. Since outlook is installed already, how do I link just the mst file to gpo, so that users can use the existing outlook profile.
My Question is:
I already created a mst file to migrate existing profile using outlook custom wizard and I don't know how to point that to gpo.
Any help is appreciated.
Thanks