Why'd you keep the laptop and leave the gaming desktop to your wife? Seems like a silly choice.
You need your Desura key first, which will be sent out when the project closes. Once you have that, there are instructions in this forum thread (it's pretty simple):
http://www.goldhawkinteractive.com/forums/showthread.php/145-How-to-claim-your-Pre-Order-forum-badge!
At this point, I'd reckon it's best to order through Kickstarter, as that moves us towards stretch goals. So you'll have your medal in a three weeks time