Some games make Wii go back to system menu

From my experiences, the system resetting back to the System Menu usually means a missing IOS that the game needs to start.

I may be wrong though. I haven't had issues like this in a good while.

 

those two games in particular [res steel 2 and wii sports resort] have a mandatory instructional video it has to play on your system once.

look in the options for the "alt dol" option.

change it to use the "player.dol", run the game and the video should play.
when done, change it back to the default settings.

you only need to do it once and both games should run like normal.