Need help with mod creation

Hi there,

I am new to mods and wanted to create a mod for my server but I have encountered some problems.

Problem 1.
I have created some candles and would like to change the model of the lamp depending on whether they put it on a ceiling, on the floor or on a wall.

Problem 2.
I would like to put a fire effect on the candle that is constant. I have achieved something similar but I would like to know if it can be improved. Here is my code:

Problem 3.
I would like to create a weapons rack and let the weapons stay into the design. As in this example:

Sorry for my english :P. And thanks in advance.