Would It be possible to re-program a Super Gameboy ROM, so that you could play Gamboy games on the SNES Everdrive? I found one somewhere, and I was just wondering.

No, the GB games are running on a full GB inside the SGB, not on the SNES. The SGB ROM only transfers the graphics from GB to SNES.

It was worth a shot. Guess I'll have to wait for the Game Boy Everdrive, and hope it works on the SGB. Maybe they can program it in a way to fool it into playing the color games.

There are plenty of gb/gbc and gba flash carts that run just fine in a super gameboy and or a gamecube player.