Many thanks Raz!!!

No, I was actually looking for a "How to" on resources (Iron, Forest, Salt, etc). In particular, "How to add a new resource".

(As a completely random example, let's say I wanted to create a resource called "Divine Right" and make a new building called "Royal Throne" that requires the resource to be in the province....)

Your post, however, is excellent for trade goods. I really appreciate the time you spent and it will speed up my adding of new trade goods to my mods in development.

I guess an alternative would be to...

1. Translate the resourece forest as something you would like as a new resource (Trade Route)

2. Rename the bif files you would use for the new trade route resource to "forest".

Would that work?