Koshy: You only need to reach 5 posts before you are allowed to send PMs. That is in place to counter spam bots that create accounts and spam PM messages.
As for the parts being used, in the initial pictures where he has the green stuff all over the front, it looks like the chest / head piece to a venerable dreadnought. The completed Dreadknight, though, I have no idea what he used. The parts don't look familiar to me at all.