O.K. First you start by selecting hard or normal mode then go to area N-3 to fight Omega
Zero and beat him.Then go back to N-1 and then go to the room where there are 2 doors that
you can't open without Megaman Zero 3/4 there should be a door on the left side of the
room,go in and you'll see biometal OZ,BUT you can't use it yet.Take the go to fleeve and
talk to him and he'll take a look at it.Beat the game then talk to him again then there
you go.