As far as paypal are concerned the billing and shipping address are one and the same.
If I remember rightly this is due to the t&c's of the purchase protection.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.