I would like to make an open book cake fora Baptism.  I did purchase the Wilton book pan, and looking at it, I dont think I could fill the cake with filling.  Then I see cakes that seem to have been sculpted to look like an open book, and these look as if they can be filled.  Can anyone point me to a tutorial on making these types of cakes, or offer any help?  I have never sculpted a cake before, but it dosent seem too difficult.