VBA over is the way to go
Though not for NES classics it's just not worth it when there is a beter 3rd party NES emu for the GBA called PocketNES
There is even a emu called Unofficial Famicom Advance that has Famicom Disk System (fds) support
P.S. I have a VBA ini with more games/versions included, basicly it covers all regions, prolly needs updating aswell though