On another topic, King Kongas wrote:
"The CD tracks are definitely NOT long enough... I play the tracks to repeat a single track and it just doesnt "jive" while playing along with a metronome! I have to almost guess when the track will play again. The practice tracks are long enough and do provide a good practice tool!"
A software tool I use to make seamless loops of examples from instructional CDs, my classes, etc. is called Cool Edit. It's not very expensive ($69 I think) and easy to use. Very useful for overcoming the problem that King Kongas mentions above.
here is the link:
Cool Edit
ps-I don't work for them or anything, I just like the software.
Chris