There have recently been some substantial changes to the PhotoPass CD pre-order situation. The Beach Club was correct that they are unable to offer you a pre-order discount code directly.
I recently had a informative email exchange with Brad at the wonderful independent website stitchkingdom.com. Stitchkingdom features "The Definitive Guide to PhotoPass." This is required reading for anyone using Disney's PhotoPass service. (Go to the stitchkingom website, click on "Definitive Guides" at the top of the home page, then click on "PhotoPass".)
Under the "Saving Money" section of the Definitive Guide, Brad offers tips and suggestions for acquiring a PhotoPass CD discount code, as well as other PhotoPass discounts.
Additionally, with most PhotoPass questions or concerns it helps to contact PhotoPass directly. They have much more information and ability to assist you than the resorts do. PhotoPass can be reached by email at
wdw.photo.imaging@disneyworld.com or by phone at 407-560-4300.
Good luck!