Complex item recipes

I had an idea to make the progression a bit harder for the minecraft server, opening the nether after a certain item is crafted, let's call it the orb.
The problem is, I want the orb to be crafted with 9 orb parts, which in turn require various vanilla items.
I know how to make a recipe for an orb part, but have no clue how to make the orb require the custom orb parts.