Sorry to be the bringer of bad news, but Metal Slug has not been dumped yet =/, so you won't be able to find it anywhere online unless you personally dump it yourself. There's a few games that haven't been dumped yet, 11 games have come out for it and 3 are light gun shooters. I'm not too sure about the requirements, but it runs on my laptop (a dual core 1.8ghz with built in graphics).
Yeah it would be great if you could share your virtual boy art, I can host if you'd like (you can just attach it to one of your posts). I tried to make this tutorial clearer by including images.
This is the first I've read on atomiswave. It's looking like one I may add to my cab just for metal slug 6! Does metal slug 6 work on it? I noticed from wiki it's a atomiswave game.
Do you need a beefy system to run it?
Props on getting it working with maximus arcade! I still need to upload my virtual boy maximus artwork from your last tutorial!
Your tutorials are quite awesome!