Hi Paolo.

I had also in mind to use something like this. I downloaded and tested AJAX code in topic server.

This kind of style is very nice but I am trying to follow zen cart logic.

That's why I am doing it this way.

As you may noticed, when customer configures his PC , and goes to step 2, he is being presented with all details, and then when he goes to final step, a new product ( customer's PC ) is being inserted into the shop.

So, the main idea is that Admin configures all product groups through admin->configuration->PC Configurator , then add products to specific categories.

Customer builds the PC , a new product is being created in category Custom PC , and then customer is being directly redirected to this product's info page, to buy it.

Well, the main idea works fine and it has good functionality but now I am working on needed details.