Found this while scratching around for Austrian artillery pictures. I was impressed by the uniforms, particularly the cavalry. I believe that most of the reinactors are Czech.
http://www.youtube.com/watch?v=qEwBwRGuM5M&feature=fvwrel (http://www.youtube.com/watch?v=qEwBwRGuM5M&feature=fvwrel)
and this one.
http://www.youtube.com/watch?v=tfz3WlSwFuU&feature=related