While you're at it, here's another suggestion.
I noticed that in lessons that have rhythm guitar in them, the same is not present in the downloadable backing track. I know that it's like that because slowing down the recorded guitar parts would distort their sound, as they're not MIDI. But how about keeping the rhythm guitar in the full-speed lesson? It sounds so much better.
This is an example. There's super-cool rhythm guitar in the lesson, but not in the backing track:
http://www.guitarmasterclass.net/ls/Killer...kk-Wylde-Style/There are more examples of this, so my suggestion is to keep the rhythm parts in the full-speed BT