Windows 2003

I am using Windows NT4 with users login scripts to map network drives and automate some of the processes.

Now I have installed windows 2003 (not upgrade – clean install) and could not find the ways to use login script / goup policies to manp network drives. Can someone advise me how to setup:
1 – Users mapping
2 – Implement group policies
3 – Restrict users from changing IE settings
4 – Controling users environment remotly.

This is totally new environment with Windows 2003 server and windows XP wks.

Thank you,