A couple weeks ago, when I released CT Admin 1.5, I mentioned that there were new extension hooks to customize things. Quite a few people seemed pretty happy about that; finally, you could easily tweak your store's administrative interface however you wanted. Or it would be easy if there were any documentation about that. I wrote none though.
Still don't in fact. I know. I know, "You're supposed to do documentation before even starting to code". Well, you know what? No, that's just not realistic. Especially lately. Life just gets in the way. They're coming though. Soon too.
In the meantime; we're programmers, dammit! We don't need no stinking docs to figure out how to do something. That's why I released the CT Admin Extender. It's essentially a module "stub" to give an example in code of how to do things and even allow for customization for your own custom functionality. CT Admin Extender is fully functional and should allow you to just install it, make your customizations, and go about your day.
CT Admin Extender is setup to install extensions for every hook and shows how to add new report and data blocks to existing pages, customize the various menus, and even add whole new pages into CT Admin. It is not a plug and play solution by any stretch so be sure you know what you're doing when you install it.