megaman zx. all mmz boss doors open codes please!

well, the title says it all, but i'll go into a little detail.

in Megaman ZX, there's some doors that you can find after beating Omega. thing is, you can't enter them unless you have Megaman Zero 3 or 4 in the gba slot to open them. i think it's more like a switch, since once they've been unlocked they stay unlocked, or so i've heard. anyway, 4 of the doors respond to Megaman Zero 3, and the other 4 respond to Megaman Zero 4.

what I want, is an ARDS code that opens those doors and lets you fight the bosses inside.
now, i bought my game used, and there's a previous file that has Model Ox playable already, verifying that at least four of the doors are open. idk if it would apply to all files, but i'll see eventualy.

anyway, this is my request. please don't turn meh down!​