I currently have an online computer store,

When it comes to Computer Systems especially i need to offer different types of add-ons in the way of other parts that are listed.....

What i need to know is how do i setup...

eg. Product #1 with extra addons that will take information from another product, add that products price...and then delete that addon product from stock.

eg. Computer System

with optional addons of .. Monitors / Keyboards / Mice ect. ect.

the only info i have found is in relation to colors and things that are not actualy stocked parts.

Please help