use the server computer to do other works, which is not advisable at most of the time.

it's should be a dedicated server once FTP is running.

anyway, apart from anewlife's confirmation, you may not run Norton Antivirus 2003 on Windows Server 2003. You need to use Norton Corporate Antivirus client 8.5

for installation, it's pretty much the same as WinXP. slot in the CD, restart and go.