Mame doesn't support this does it?
With Groovymame having new features each time I upgrade, I find it pretty hard to keep track of my ini changes by memory or by notes. I was thinking we can tweak hardware specific ini files, like cps2.ini, with a nice short list containing only options of interest, then easily transfer them to a new mame version (usually). Wouldn't it be handy if we could do the same thing with a global user-changes file?
Or is this possible already and I've just missed it?