Linking common sub-categories

[esemze]

little bit hard to explain but here goes..

my categories are structured as follows (for automotive)

Make
> Model
>> Year
>>> subCategory

Now, the subCategories are as follows:
Interior
Exterior
Engine
Accessories
Suspension
etc..

this makes all the subCategories common to eachother however they're split up because they're underneath the make,model and year...

question is how to i make a link that will pull up everything thats listed with say Interior as a subCategory??

another example of what i mean

you click Engine and up comes every engine related product

The subCategory menu is going to be static so i'm going to need to format them as actual links not as a query from the database..

[esemze]

anyone??

[esemze]

..............

[gjh42]

If you really need this, you might better post in the Commercial Help Wanted forum.

Alternatively, you can link all of the products to a set of categories for general subject, as well as the original categories for M/M/Y subject.