1. Media Player did open it, but only after complaining about "the file has an extension that does not match the format...."

Yeah, it did that.

Dunno if this is relevant or not, but all 5 files were copied from a cd onto the computer, and it does play 1 out of the 5 files.
It doesn't play renamed files that weren't from a cd either though.

New username: hixxy