how to give the password for server

hey i installed win 2003 enterprises..wile installing i didn't give the password for administrator i skip the that option,after installation i thought to give a password but if i got administrative tool..their i dint get any password giving option for administrator..even i saw in manage and user and groups..but there is no option like user and groups...so i just want to give password to administrator so where will i get the option to give the password..

You can't use google ?

start->run-> cmd

net user administrator The-Passw0rd