Providing you have enough geometry (if not, insert edge loops is your friend) then its a simple matter of non uniformly scaling some verts, maybe even sliding some edges around.



Also it'll probably be better to see your progress if you posted wireframe on shaded screenies of your viewport instead of dark renders.



If you're uploading muliple images at once I'd suggest using a hosting site like...


Photobucket

Imageshack

Just some pointers