This is a slightly updated version. Note that the database has been changed to
make the use of filters a bit more rational. More changes are possible, so don't
take this database design as final.

Admin -> Catalog -> Categories/Products now mostly works.
Admin -> Catalog -> Products Specifications is closer, but still needs a lot of
coding to make it usable.
Several files have been added, mostly to the Admin side.
Everything else is pretty much the same as the previous release.

If you are at all interested in this, please give us your thoughts on the development
thread: http://forums.oscommerce.com/index.php?showtopic=336920

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