Actually you're a lil off, that won't work.

Starfox1 is a FX 1 chip at 10.5mhz, the Starfox2 game uses the FX2 at 21mhz, but actually a PAIR of them. The ONLY game that does that released is Yoshi's Island. You'd need to desolder the game rom, flash starfox2 onto a rom, reattach that to the Yoshi board w/dual FX2's and you're set. A guy at the Advanced Media Network I do some stuff on made his own that way.