... tired of relying on thirdparty addons to make things happen that mIRC does on its own.
What do you mean? That addon IS mIRC script doing things on its own. It doesn't use any dll, and is pure mIRC scripting.
I understand where you're coming from, I don't use any full script or anything.
However, I actually use such hash table viewing addon myself, since it's simply easy to get a quick view of information about your hash tables currently loaded, without having to script the whole thing yourself.
Greets