Wii Homebrew Emus (not setup)

Ok, so this is all fine and dandy, especially when you get it up and working, but how am I gonna play the games? The ROM games that is; i.e., Playstation or GBC/A?
Say I want to use 1 or 2 of these emulators here.....just how do I do that? It'd be cool if this answer would be added to the tutorial that's around here.
Of course, the tutorial being here.

Did I do something wrong w/asking this question? Or does nobody know?