IMPORTANT: Wii sports resort requires the WII MOTION PLUS. If you do not have it, you can not run this game!
Booting WSR isn't too difficult. But as its different from usual booting methods, it is listed here.
1) When you boot it for the first time, Alt dol loading must be enabled.
Go to settings / game load
Click on selected dol and choose the known to work option. Click save.
Depending on your cIOS, 002fix or Anti002fix may be needed.
2) Watch the WM+ instruction video. After you watched it, the Wii will crash, so reboot.
3) From now on, load the game with Alt-Dol OFF