Ok,
So I decided I wanted hi score abilities.... I read that it's not too hard to compile your own version, so I did just that.... Followed documentation, etc...
I ended up with a mame.exe that was 30mb in size... (big)
My mame directory now looks like this:

That seems kinda small to all the folders I saw before compiling.... Do all I really need is what's listed above?
Thanks!
PS. I'm using maximus arcade as a frontend...
-Pete