Have a look in Advance manager under settings, Table editor, click on 'AS' folder @ top left, expand AstorProfiles & scroll down to EXT_Wood_Stock
You can see from the table what values are required under the various table headings. It's relativley easy to add in your additional sections as required.
You can also open & edit these microsoft access data base files directly, as long as you know there locations. (I'm sure someone more knowledgeable will be along shortly with an explanation/description of this procedure).
Be sure to enter your "OwnerText" value as this will assist your automatic version update when a new version of Advanced Steel is released.