I'm glad you're enjoying the tutorials. The reason for the boost from part 3 to 4 is because there was a good month or two between them because of getting a job with a game studio... the work I've done for them has really helped me improve.

I'm not sure about your head issue. One thing I do in the video often is make the geometry transparant so I can view the image planes. If you've done this, you should only have to select the head and go to the last tab in the attribute editor for it's material options.

If that's not the case, perhaps try uploading it to here so we can take a look.

As for posting your progress, the VIP forum if you'd like to keep it between subscribers, or the more public WIP forum if you don't mind everyone seeing it.

Looking forward to it.