Mario & Luigi BIS

Hey, for BIS, can someone explain to me how to do the YSMenu thing in simpler terms and such?
I read the main one but I can't make sense of it all for the R4 original. Help is very much appreciated.

http://www.megaupload.com/?d=8JU4EX65 download then put marioluigi bowser story rom not patched rom in games folder then put it all in your micro

alright thank you!