You could probably get away with buying a generic guest book meant for Weddings, and then adding to it perhaps?
I got married recently and here are some ideas I saw:
A guest book themed with the colors of the wedding, with pictures of the Bride & Groom scattered throughout the book. Perhaps baby pics of them growing up, then photos of them dating, into engagement, etc.? You could have these pics mounted with the color CS you mentioned, etc. with embellishments...then have spots where guests can sign next to them. That would be very entertaining for people to look through. This would also allow her to add to it later on!
Another idea that I've heard is doing a "photo booth" guest book. where you leave a Polaroid camera next to it, as people come in, they snap their photo, and insert into a spot on the book, then sign their name! It's a cute idea.
I suggest checking out
www.theknot.com for more info. You can always search the Bios' and get more information on what other brides have done. This website might also help - it lists out "specialty bios" where people feature things they have done, etc.
http://bios.magnificentbliss.com/specialty/
Good Luck! PM me if you need any more wedding resources! :mrgreen: