played metal slug 7 on my ds today and it got me thinking.... tho' I used to be able to use GeoMame for that kind of thing, is there anything like that today? (I think GeoMame is PPC only so it'd run slowly if at all now)
If you check the NeoRaine page, it shows that SDL frameworks are needed. So in the end, you may as well just use MAME SDL, since you're going to have to muck with those frameworks anyway. And doing so will give you a fully functional MAME/Neo Geo emulator.