Got my m3 and a 1gb sd card

Mario Kart is awesome - especially via wifi

As far is NES emulation, is there a way to have save functions without changing the
.nes games into .gba with the M3 Game Manager (V2.7)? Its ok if this must be done,
but I'm spoiled with x-rom running pocketnes via pogoshell - care free saves. Same
question with .gb and .gbc games using goomba and color goomba respectively.
BTW, how does the m3 react when you don't have flashme on your DS? When I turn
my flashme'd DS on, sometimes it will go to the DS menu (and not the m3 startup screen).
I read something that this occurs sometimes because of checking for m3 authenticity. Most
of the time it does work though, and I go into DS mode in the m3 frontend. If I want to play
gba or nes games, I must hit select on the m3 homescreen - and then it boots into gba mode.
Is there anyway to disable the "this is not an offical nintendo product" screen?