I've done this before but some time ago. I have several "recipes" for wooden objects, a source of wood and a crafting woodwork bench, what I need is a category "Wood" to appear and a sub-list of items that can be created.

Thanks for any help.

This might be what you are after

http://www.creationkit.com/Customizing_Crafting_Categories

Thank you, studying it now.

Update: Good thing to learn. Shame it is hardcoded and only 2 "slots" are available for crafting with new materials. Now have Wood Crafting available on my woodwork benches to make er... wooden stuff. Thanks.