taxonomy

This is my first post to the Drupal Dojo, so please forgive me if I sound like a noob. This is only because I am :)

I'm working on a Drupal6 site where I have created a vocabulary, the terms of which are product categories. The terms I've used have a nested structure and there are certain terms that have no nodes, only other terms, within them.

I can create a view that returns all products grouped by taxonomy term (http://www.cibus.co.th/pricelist) - that's the easy part.

My problem/s:

Preface:

I've read a lot of requests for using multiple taxonomy term names as view arguments. I found a code, but it didnt work for me.
Views default argument handling using termid rather then name works beautifully, using forms like: "mydomain.com/viewpage/termid1,termid3,termid2" or "mydomain.com/viewpage/termid1+termid2+termid3", but I found the support for term names lacking.

Concept: