I got your email, thanks, but I decided to answer your questions here.

The RPC service is already running, good.

The batch file runs every time the user logs on, BUT because of the syntax of the xcopy commands once the files are copied over to the clients, they only get copied over again if you over write the originals on the PDC/BDC netlogon dir with updated files (as in an upgraded Kixtart release.)

TIP:
If you set up the NT replication on the PDC netlogon dir to replicate to your BDC's netlogon dir then any updates or files you place in the netlogon dir will get replicated to your BDC's too!

I think your getting there. Try a test user and script first before going "live" so you can iron any bugs out you may have written.

Good luck
Rgds
Don