It's not really a subject that I'm well versed on. A poster named Ann brought up this subject two years ago on the News and Views Board. I did a quick check on line and found this...which only mentioned 34 men ( not quite two regiments). The archives of News&Views might tell more. They did join a TN Regiment... to keep it relevant to this board.
http://www.illinoiscivilwar.org/cwtn15g.html