SimpleSearch with a custom where or something like that

Hi all,

I have implement SimpleSearch wich is almost fitting my needs. I would like to search inside a specific container. This ID could be setupped in the properties, no problem. My site structure:

Products
- category 1
-- product 1
-- product 2
-- product 3
- category 2
-- product 4
-- product 5

etc.

Nou I only want to display products and not include categories in the results. How do I do that? I have tried postHooks but can’t get it working. Does someone here have some experiance with this? Could I add a custom where, as liked in getResources?

Thanks in advance

Regards, Bert