I realize this is an old thread but maybe someone will read it..........
I own all of Dalton's books and have read all of Steidlmayer's works. Even though I do not use market profile in my trading I learned some useful things by reading them. If I had to do it over again I would read them.
I have two reasons for NOT using market profile. 1) I can use a 30 minute chart and see the same thing. 2) The market profile is time based and does not show me if there was a lot of interest at a price.
Some of the market profile theory is relevant to volume profile. I like the volume profile because it shows me where people are interested in trading. If you are a short term trader this information is much more useful.
For "scalping"? First we have to define what "scalping" means to YOU. If you are going for two or three ticks I am doubtful volume profile will be useful at all. I don't see how either of these tools will improve your results much other than to avoid high volume nodes. In my trading methodology I am going for 10 to 20 ticks (more if I can get them) on the 6E. I consider this "sort of" scalping.
What I find the volume profile useful for is determining where price is likely to stall (high volume nodes) or move through quickly (low volume nodes). It doesn't always work out and it is not my primary decision making tool. From my experience it isn't wise to trade around the VPOC of the volume profile. When price is trading around a high volume node it isn't as likely to move as if it were in a low volume area.