A while back there was some discussion of other 3D software to complement ZBrush.
I came across this the other day: http://www.pcplus.co.uk/article.asp?id=8556
It is a free (legal) copy of Truespace 1. While I am not a fan of Truespace in its current incarnation I was a huge fan of v1. It was the first 3D app I used and helped ease the learning curve a bit. It’s a very capable application.
There is also a quickie tutorial off that link. Might be worth plunking around with if you are interested in modeling things the “hard way”(ie. not in Zbrush)