Hi and welcome to the site.
Check out Wilhelm's book on creating a pentest lab, I reviewed the book for this site here
which also includes a sample chapter, which could actually be the best place to start for what you are attempting.
I've spent the last year+ building up a working environment and am starting to get to a point I feel the first version of my lab is 'complete'. I've documented a lot of my working on my blog
, relevant posts are tagged with lab
Hope this helps point you in the right direction, happy hacking
P.S. Just taken a look at securit.org as I hadn't come across the site, and that is some coinage they asking in membership fees. I'll mirror info_genius' question; Anyone have any experience with securite.org?