Games :: How To Use An Emulator Snesoid?

okay a have a general idea of how to use an emulator. i have a list of games at my disposal. so when i find the game i want, i save it to a destination on my computer, then i mount my sd card through my phone, throw the game onto the sd card (anywhere) via my computer. then no matter if i unmount or stay mounted, ill run the emulator on my mytouch, search for where i put the game. click on it, then it will take me to a blank screen as if it wants to load the game. and since i have the free versions of these emulators i also see the ads at the bottom, so i know it didnt crash. it just isnt loading