Does pushing F5 bring up a list where you can choose to go to a command Prompt? Or do you mean you cant get past your password? If it's the latter you can just whip the bios chip in and out to reset it to no password i believe. I used to be able to get around them that way back in the day.
Windows XP PRO:$0, Visual Studio 6:$0, Age of Empires 2:$0, Halo:$0.
Having $100s in free MS software while people are being sued over $.99 songs: Priceless