According to information I found here:
http://en.wikipedia.org/wiki/Musical_Instrument_Digital_Interface
...a ".kar" file is actually a midi file with a different extension. If that's true, then you should be able to play a ".kar" file in any midi player by changing the file extension to ".mid"
So to extract lyrics from a .kar file should be identical to extracting them from a normal .mid file.
http://en.wikipedia.org/wiki/Musical_Instrument_Digital_Interface
...a ".kar" file is actually a midi file with a different extension. If that's true, then you should be able to play a ".kar" file in any midi player by changing the file extension to ".mid"
So to extract lyrics from a .kar file should be identical to extracting them from a normal .mid file.