Subsite lookup from Parent site column gallery (MOSS 2007)

Customer asked to have a list on a subsite "reuse" a content type (lookup) from a list on the parent site of site collection on a subsite of the same site collection.  You can do this using just the WFE for MOSS 2007.  You need to add the list content type to the site column gallery for the parent site.  This will then be available to all the subsites in this site collection.

Benjamin Niaulin, explains how to do this on MSF

https://www.nothingbutsharepoint.com/sites/eusp/Pages/Create-a-SharePoint-Lookup-Column-to-Another-Site.aspx

It is pretty much the same in MOSS 2007.  The key is to add the type to the site column gallery.  I bumped around a bit trying to get it to work with the subsite lookup until I did this step.