Multiple Super munchkin cards

[CalmK]

So I played today munchkin and a question came up, and that is can you use 2 super munchkins in order to have 3 classes at once or are you limited to 1 super munchkin?
A follow up question is if you can have 2 super munchkins but play only 2 classes do you get both as a super class or only 1?

[bonetm]

You can't have more than 1 Super Munchkin card in play.

If you want, you can check out Munchkin 7, where there's a card that allows you to have 3 Classes, although I wouldn't advise using that expansion unless you're also adding 2-3 other expansions.