Unable To Log On To Correct Domain In Safe Mode

I have recently come down with the Smitfraud trojan and have downloaded the command prompt program "SmitfraudFix" to hunt down and terminate my infection. However, the actual "killing process" that SmitfraudFix undergoes requires SafeMode to work correctly (I would assume so it does not harm other normal files). It would seem simple: log into Safe Mode and execute the prompt. Yet here is my problem! I have a laptop that was given to me by my college and instead of having my primary user account (which is given full administrator capabilities, but is not the actual Administrator account) as a "this computer" domain to log in, it logs in under the "GCC" domain (I go to Grove City College).

I would not have imagined this to ever be a problem, but when I start up Safe Mode to execute my trojan-killer I am given only two login fields, not three. Thus I have username and password inputs, but no "log on to" option to choose "GCC." So when I type in my username and password in Safe Mode they are (I presume) assumed to be "this computer" domain inputs. I think you can see where this is going...........