okay, heres a computer engineer's input:
(you need to be familiar with Linux to do this) Get a USB memory stick and download a Linux OS to it. Make sure it boots as Live. When it loads up you can pretty much browse the whole HD on that computer but not the server. If you want to browse the server you can go to Konsole and try to find the default gateway and the certain IP you want to hack. Then try sniffing it until you find a string that may be a the admin's password and username(this part is time consuming). Once found login and do anything you want =).