if workgroup name is not same then start "make a new connection wizard"
give same workgroup or domain name ,turn on file and printer sharing .
right click on the folder u want to share , check the box "share this folder on network" thats it ,
go to my network places in the start menu ,select view workgroup computers (on the computer in which u want to copy,
)
u will see the name of the computer(that u have entered while making the connection).copu it,
u said u have administrator privilages how so in college , if the net in yr college is distributed thru router it may be possible that they might have disables "inbound traffic".type //192.168.1.1 and check if u know this username and password.