Showing both categories of product (with multiple categories)

Hi,
I would like to ask if there is a possibility to customize zencart this way:

I have products with similar category tree:
-tea
..- by origin
....- China
....- Japan
..- by sort
....- black
....- green

Every tea is mapped to two categories, one by origin and one by sort. Now when I browse for instance black category, I would like to see to which category by origin every tea belongs to and vice versa.

And I would like to have these teas in black category sorted by the second category (China teas first, than Japan, etc.).

I appreciate every advice, thanks a lot.

If you use China and Japan as "manufacturers" (changing associated text as required) and black and green as "models", you can sort by either of those in the product listing. This assumes the product title is sufficient for the rest of your identification. If you need to use those for their original purposes, then I can't help you with an easy fix.