Tomek-
Thanks... That's exactly what I did, dissecting Raygun's layouts helped me tremendously. That, and a little trial and error of course. Ergo, the reason that I've created so many layouts. Now, my layouts take a swiss army knife approach.
So, here is the mame layout. The cool thing about this layout.nut is that it can be used with all the skins I'm working on like nes, snes, genesis etc. Scales up to 1080p.
A few details for layout options:
Listbox is on by default - turning it off, enables the wheel llke in robospin.
Shaders are turned off by default now - just enable whichever one you prefer if any.
Bg1 is default - 3 to choose from.
Check layout options for even more options.