Subtract from stock when using attributes

[amgat]

Hello. First post ... i've tried to find a solution to my problem by going through lost of threads in the forums ( and been using the search function ). This is the scenario:

In my shop I sell ie. mobile phones and have put up the following products and categories:
Phones -> HTC touch HD
Accessories -> Screenguard -> HTC -> HTC Touch HD screen guard

When a customer want to buy the HTC Touch HD phone, I want to present a dropdown list / lists with accessories for this phone. If the customer choose to buy the HTC Touch HD screen guard accessory, I want the stock on product Accessories -> Screenguard -> HTC -> HTC Touch HD screen guard to be subtracted by one

Hope you understand what I am trying to achieve. And please yell at me if there's an obvious way of doing this.

[misty]

Stock by attributes mod from below
http://www.zen-cart.com/index.php?ma...+by+attributes

[amgat]

Thankyou for your reply. By reading the description of that module, it seems that this mod has a seperate attribute stock and does not subtract from the stock value of another product?