Details are to be found on the MaLa Website on how to a achive an quick and easy set-up.
The following information is posted here to suppliment that.
Quick MAME setup
(Work in progress)
1Q) Why do my games list show much more games than Roms I have in my Roms folder?
2Q) How can I skip games in the list like MameWah does by hitting the joystick Left and right?
3Q) I run into an issue when I want to scroll through games - it only moves 10 games and stops. If I release the stick and press it again it scrolls through 10 more. 3A) This happens when you have your scrolling acceleration up too high. Try reducing it to say 5 then you can FLY..... through the game lists