First, sync your Wii remote to your PC. there's instructions for that here: http://www.wiibrew.org/index.php?title=Wiimote_Tutorial or here: http://www.wiili.org/index.php/HowTo:BlueSoleil , depending on what Bluetooth drivers you're using. (Some adapters may not work, or may have limited features)
Once that's done, download, extract and run GlovePIE: http://carl.kenner.googlepages.com/glovepie_download.
Once that's running, you'll need a script. You'll find my script attached, which you can use. Extract this and move the file SMC.PIE to the GlovePIE/wiimotescripts folder. Load and run the script from inside GlovePIE, then open SMC. Make sure it's set to the default controls, and you should be ready to go!
Controls
There are three control schemes included:
1. Retro. Hold the Wii remote sideways, like an NES pad. Use the D-pad for movement, 1 to run/ shoot and 2 to jump. A to pause, and Plus to accept menu selections/ use itembox.
2. Classic. Connect the classic controller for SMW style controls. D-Pad or left stick for movement, x,y or R for run/ shoot, a/b for jump. Plus to pause, and minus for itembox/ menu selections
3. Modern. Connect the Nunchuk for a more original experience. Stick for movement, Z to run, A to jump, B to shoot. Home to pause, Plus for items/ menu selections. You can also use the D-pad for menu navigation.
You can switch control schemes at any time, just by changing the thing that's plugged in.
Nothing here uses the motion sensitivity, because it's hard to code, and I can't think of a good way of building it in. Also, the analog sticks don't actually offer analog control. That would require some PPjoy magic, and I can't get that to work

Have fun
