Sorry if it had been a bit of delay in replying..

Well, the teacher's implementation part was available in a sample application available with multipoint sdk 1.0. It was a map game. (Don't know if the samples have been changed with v 1.5.) There were really good examples made available to us with the sdk. You can search for it in the net, I guess. And for the inkcanvas implementation, I saw that you have found the blog that did it. I hope you will get response for that post very soon too...