Hi, yes, it's possible. But it's not simple. The emulator has to be prepared for the EmuMaster. There are many things that are common to every single emulation (e.g. save/load functionality, frame blit, sound output and many, many more). In order to provide a great experience these common things are the same in every single emulation in the EmuMaster.

Right now I'm working on the current set of emulations to be the best. The N64 will come next. So you see that a new emulator from your list won't be added in the near future, sorry.