Can't you just take the same style sheet from that page and apply it to your vBulletin forum? You'd have to replace all the images in your templates.
But if you want to do it by hand, you could always use
Skybound Stylizer which is about as close as it gets to a point-click CSS editor. Though I've become more experienced with CSS, I used it back when I had no CSS experience and it helped a lot. It comes with a trial period, and you can use RunAsDate to bypass the trial, so you'd have plenty of time to whip out a Totse clone theme.