Recently I came across a site which contains some modifications in app/code/core/Mage/Core/functions.php file. I would like to keep code clean and move the changes to custom module in local scope; but as the functions.php file does not fall under any basic magento block, I don't know how to create custom module for it.
I would like to hear if you have encountered such problem before and you approach to solve it.
Any constructive comment is welcomed.
Thanks in advance.