Starting to look pretty good SomeGuy, keep it up!

having difficulties sticking to a model, huh?

you really should increase the repetitions of the squares to see where there's stretching

use exponential..reset the settings and increase "subdivision levels" to 2 or 3, and you'll be fine

Actually Sub-d's uses the same smoothing technique as polysmooth so then your using some weirds settings when smoothing.

if you want to render sub-d's with Mental Ray, you either have to see that you have only quads in your model, or simpler, just polyamooth it.

There is an optnion in the polysmooth that let's you...