Psx/GBA/Snes emulator questions

[twig978]

I know that the psx4iphone emulator runs better with bios which bios do i need to run best because i have SCPH7502.bin or whatever from my old PS. Does the GBA emulator and Snes emulator need bios? Does the GBA also play old GB roms? Does the Snes emulator also play NES roms? I can install this all from installer app right? All the emulators. Sorry for all the questions...

[yashasvi]

yes You can install all from installer.app
get all sources
The new install packages do not require BIOS