Can i combine enhance CCK type with code customization?

I have a content type that i created using cck.
Now this type is a product (ECommerce) and need to customize it's behavior using the product API.
But i don't actually have a module file in which i could put this hook implementations.

I thought CCK could allow this by calling hooks further down like: (my type name is style)
CCK_Style_productapi

does this exist?
what do you say about such idea.

tnx,
hed