I'll try to explain in simple English:
The weapon scripts will not work in TTT v27. It was broken in a GMod update. You need TTT v28.
However, only dedicated servers can install TTT v28. If you install it in your own GMod, the game will keep using the old TTT v27 because it is included in GMod.
If you have a dedicated server and you want TTT v28, you can find the download link here: http://www.zombiemaster.org/smf/index.php?topic=9303.msg450916#new
I don't think you will be able to test weapon scripts in your own GMod until GMod 13 is released.
The weapon placer was always a stool offered by BKU... did you just re-make something that already existed?
He pasted the readme, probably to show that he followed it.