CAN SOMEONE HELP ME PLZ

I got the Snesx9 mod for my psp and i cant add a game why i already have zelda in it but i wanna get Mario Rpg but it has a .7z at the end while zelda has .sch or sumthing like that does this mean i have to compree or do something that involves thinking couse im down just plz help me out

you need to extract the rom using winrar. See our tutorials section for help.

Please read the [rules]. Using internet shorthand, such as "plz", is against the rules. Also, please refrain from using such a general subject title, such as "CAN SOMEONE HELP ME PLZ".