Magento is not running my install script

The main culprits of an install script not running:

1. Typo or something incorrect in XML config.
2. Install script was added sometime after module was installed and it never runs because core_resource already has an entry for the module.
3. You're not emptying <webroot>/var/cache
4. Incorrect file/directory names.

Your path of app/code/local/Bottom_Name should be app/code/local/Bottom/Name