hello all, i wondered if you could give me a few pointers on modelling a Crusader style helmet?

I'm totally new to MOI and I usually use Cinema 4D for all of my modelling, so I can't really get my head round it.

The Crusader Helmet I am trying to model is like the one in the link below.

http://www.swordsandarmor.com/images/H910902_Crusader_Helm.JPG

Hope someone can give me advice etc.

Thanks.