Err I know this isn't related to the topic, but what are the brick textures your using?
it forgeted up all the house and spying us now :(
http://www.mediafire.com/?1bsaha2bfaar79vhere.Enable it then type /toggleOB to turn it on/off. Credit to General for making dis epic script
I made a script for myself a while back that does exactly what you are asking for, it allows players to plant inside of bricks. You can download it if you like.While in-game, you have to type /toggleOB in the chat in order to toggle the mod on or off.
What if you just hold enter, will it place unlimited bricks inside of bricks?