Possible? Multiple Parent Categories for a Category?

[Guest]

I know that this might not be easy, but I was wondering if it is at all possible to alter osCommerce to allow each category to have multiple parent categories.

 

Basically, we're an offroad automotive shop. We're basically selling 4 main types of parts now: Jeep, Truck, UTV and Outdoor Parts.

 

I had found a contribution where I could create different boxes for each of the top level categories. We were thinking about making our four main types the top level categories and putting them each in different boxes with their own sub-categories

 

Here is the hard part: Some of the sub-cateogories are general and would fit into more than one of the main four. I know that the easiest thing to do might be to make a new category and then copy (link) products into both. But we're talking about a LOT of products and quite a few sub-categories. So, I'm trying to see if there is a way to either insert multiple parent categories for a category. Maybe we could possibly even have multiple category lists within one store and maybe having some type of check box on each category to decide which lists that category will show up in.

 

Does anyone think any of this would be possible?