Multiplayer?

Hey, is there a GBA emu that supports 2+ screens at a time for games like mario kart, mario bros., or Zelda:4 swords? I've seen a regular GB emu that has this function, but I'm dying to play 4 swords with my friends, as I've never played it before!

whoopsee! I read another thread and I JUST found out that it hasn't even been emulated yet! Drat! Will it ever be? I'm not asking for netplay, but just 2-screen emulation. The old GB emu that implemented this was for DOS and worked FLAWLESSLY on my old Pentium I 166MHZ! It actually had ZERO frame-skip! So someone, please implement this for GBA games. If I wasn't so money-tight right now, I'd even pay you!