Good on ya,
Shame you don't have a disk
It must be annoying not to be able to use your new pc, I know I'd be pissed off.
Here's a pic I found, all this stuff is in the manual you know
You could d/load and chuck on a Linux distro I guess, but you'd have to know your way around Linux.
You'll need someone else to help you with that because I've never run it.