Donna,
I don't have any experience with your type of project, but I would suggest you try posting your question to the gingerbreadhousebaking Yahoo Group.
Here's a link to the main page. Click on "Join This Group" and follow the instructions.
http://groups.yahoo.com/group/gingerbreadhousebaking/
There are absolutely tons of old message posts that you can search, plus you can post new messages, and there are photo files and links to gingerbread house related web pages.
Good luck with your project.
Edith