The tunes were altered slightly to get them to sync up with eachother.
The PC tune is in the left speaker, and the Wii is in the right speaker.
Request a Cave Story tune, and I'll do a PC + Wii mix of it.

Comments: The first PC + EuWii. It turned out nicely.
I know I haven't finished every PC+NAWii tunes yet, but it would definitely be preferred to go for the PC+EuWii tunes instead.