For everybody who is interested in building their own gingerbread castle, here is the construction plan I made after building this one: http://www.davidfichtmueller.de/downloads/cons truction_plan_castle.pdf
A blog entry in German with more details on the construction process is available here: http://www.davidfichtmueller.de/blog/2008/12/l ebkuchenburg/
If you have any further questions, just contact me.