Local admin rights with server2003

In the user accounts dialog in the control panel on that computer, select the advanced tab. in that tab is Adnaced user management with a button labeled "Advanced". Click it. That opens the Local users and groups window. Open the groups folder and double click administrators. That brings up trhe Administrators group properties. click on the "Add" button and add the user. it can be a domain user, or a local user but you must specify the domain for a domain user. It must be done on the computer where the rights are being given.

If you are on a domain and have domain admin privileges (or higher) Just click start, run, and type in MMC. This will bring up Console1. Click on File, Add/Remove snapin, then add, then select the local users and groups snapin. You will then prompted for a local or network computer(choose whichever is appropiate, it does NOT have to be the local PC). If network PC put in the name (or IP) of the PC. Click finish, then close, then ok. This will bring you back to the Console1 root. Double click the + next to Users and Groups, then double groups, then double click "administrators" in the window to the right. You will get a box with an add button, click add, then select the correct location for the user you are adding (sounds like the local machine in your case) then type in the login ID of the user you are wanting to add. Then hit the standard "Apply/OK" buttons. The user is now an admin, but it wont take effect until the user logs off/on, (if the user was logged on already).