Now that I don't get, I've been using Win7 on my 'new' computer for the past year and a half, and never had a problem with 3dArcade. Although, I have to agree, Win7 is the most worst, most frustrating OS ever to darken my doorstep. I'm a graphic artist and I had to pretty much abandon every program and method of working I've used for the past ten years.
First things first, have you joined the 3dArk forum? If not, first time on you'll encounter a splash screen in Dutch. Click on the British flag (or maybe it's the American flag) and it will switch over to English. It just says that to use the forum you have to enable cookies. Click OK (or whatever) to to through to the forum. Then post your questions.
Most of the reason it's so configurable is because it's made to work with so many emulators, and also to allow you to set things up however you want them. Here's a few examples from my setup: a pinball-only arcade, a room where I redocorated in a 'vector' theme, and a wall with a Berzerk mural. Also, I set up the kiosk in the hallway outside the Time Out arcade to include changeable movie posters, and swap 'em out every couple of weeks.
BTW - Nightwoice, nice pizza! Cylindrical xtramodel?