ZSNES board

how would i set new keys? is it in the game or in ZSNES itself? i know some games have control setup, but it will only read certain keys, how do i change them?

i know you can play 2-player ZSNES if you have two of those controller port thingies, but if you dont have any, can you still play 2-player? if so, how?

where would I download games? super mario RPG and megman X2 in particular? I AM NOT REQUESTING, DONT BAN ME. i want to know where i can download them, and i do not require a direct link to the game, just what site can i get them from, or if they're on zsnes.com, where i can find them.

Thank you.