I installed windows xp and windows server standard on one disk. Now everytime i boot my server, windows xp loads automatically. If i want load windows server 2003, I have to manually hit the arrow keys to select it, if I dont, it times out and it automatically select windows XP by default.

I want to change it so that windows 2003 boots up by default. Can you show me how to do this?

this is something like how my screen look when its booting up

Please select the operating system to start:

        Windows Server 2003, Standard
        Microsoft Windows XP Professional

Use the up and down arrow keys to move the highlight to your choice.
Press ENTER to choose.

For troubleshooting and advanced startup options for Windows, press F8.