hey men, to dragg your knee isnt that a big difficult, all you should to do is to place your body wright on the bike and you'll feel the ground with you knee very soon

its really increadeble feelings

)) check few dragging knee photos of professionals and you'll understand your mistakes...
as for scrabbing your boot - it is direct indication of wrong foot position on your footpegs (the same was with me at first time on the track), you souldnt toutch the ground with your boots unless you drive like Stoner or Melandry in the last motogp race
There are different opinions, obviously, on what to do with your feet. At the Spencer School, Nick Ienatsch, Freddie, and the rest of the instructors will tell you to ride duck-footed on the inside peg, with your heel against the heel guard, the ball of your foot on the peg (even hanging off the peg a bit), and your toe pointed out. Makes it much easier to get your upper body in the right position. They did point out that you will drag your toe from time to time, but pointed out that "that is why boots have toe sliders".
Try this while sitting in your chair - keep your feet straight and about shoulder-width apart, and try to lean your upper body over your right knee. Now point you toe out, and see how much easier it is to get your upper body down towards your knee. You can get it out further and lower with toe pointed out.
When I started to practice this new technique, I didn drag my toe some, but I also changed my knee placement, so it was touching the pavement on a different part of the knee. I had to bring them up and out - but before I realized I needed to change them, I wore a small hole in the outside leather panel since my knee was touching in a different place.
But much better to save that for the track. You shouldn't be pushing that hard thru an intersection.
But try out different methods to see what works for you. I have found it easier to have my toe pointed out, but there is more than one way to skin a cat, so do what works best for you.