Can any one help me with how to set up the folloing in zencart attributes, or suggest any module that will allow this.
I have a product which is a wooden window. It has three attributes 1) Wood type (Softwood) (Accoya)
2) a width attribute 3) a height attribute.

What I want to be able to do is have the customer select the wood type and then the attribute for items two and three are selected for softwood with the price changes for softwood. If the customer selects accoya then i want the same widths and heights but with a greater price off set.

to give an example selection = softwood width = 1000mm (£.00) height = 1000mm (£.00)
selection = accoya width = 1000mm (£10. 00) height = 1000mm (£8.00)

This basically is if softwood is selected then softwood attributes, if accoya is selected then accoya attributes.
I seem not to be able to resolve this other than to make two products, however this then takes away a comparison of the differnet types of woods directly for this product.