By lowering the FPS you mean limiting the FPS to something lower than full-speed? I used to do that before I had a good computer, and half-speed (usually 30 FPS) was okay for most gameplay. The only thing lowering the FPS limit will do is reduce the strain on your computer; it won't have to work as hard as before, but the games will still run slower than full-speed.
Unlike most PC games, which use frame independent motion (google it), I think GC/Wii games are dependent on the frame rate for motion. In other words, a PC game running at 45 FPS or 70 FPS might not seem too slow or too fast, but GC/Wii games will.
If you can deal with slower, laggy speeds, then go ahead, lower your FPS limit, but it won't make the experience any smoother.
Unlike most PC games, which use frame independent motion (google it), I think GC/Wii games are dependent on the frame rate for motion. In other words, a PC game running at 45 FPS or 70 FPS might not seem too slow or too fast, but GC/Wii games will.
If you can deal with slower, laggy speeds, then go ahead, lower your FPS limit, but it won't make the experience any smoother.