Mapping home directory in windows server???

Hello there,

Can anybody please tell me how I can set up home directory mapping in Group policly in win 2003 server.

I have shared directory on the server. I want users to see their home directory mapped to a drive letter when they log on(i.e H:\home\%username%.
I know how to do it in user profile, but I want to be able to do it GP.

I appreciate any help.
Thanks