Yeah I know about the 7805's but the guys at benheck said it wasn't very effecient they reccomend DC DC converters but I dont where to get ones for my use, short of building I am kinda stuck.
EDIT: I also need this for my Ultimate GP32
this all sounds very interesting... is the GP32 thing something to do with linux?
and what were you gonna do with an N64? make it into a handheld?