In order to reduce the file size of the actual system, and to facilitate third party software, I had to create a method of making a modular program which would reside in a single slot yet be able to have whole blocks of code addable through code. I found out that PRGGET$() includes the linebreak, which is preserved when saved, so I created a way of converting a program into...

a string which can be saved and loaded at will, and appended to the specified slot! Along with COMMON DEF and USE this allows for me to create "code libraries" that contain custom methods, callable from other software! I've dubbed them "Modular Code Libraries" (or MCL files) due to their modular nature. Neat, no?

Huh alright, that sounds pretty cool Make the code library have everything, that way each application can be more compressed, but if I were you, i'd stick to a easy to understand naming system

Neat! How is this MCL format different than just LOAD("TXT:...")?