Tutorials
Creating a time delayed command
This explains the structure of a time delayed command, and the inner workings
of add_timer as it relates to the creating and usage of a time-delayed command.
The example commands show how to create a command that requires arguments as
well as one that does not.

Converting Room Flags to Extended Bitvectors
This is a very simple outline of how to change rooms to extended bitvectors.
You will have to do your own search/replacing of the common macros, this deals with the less common
or more difficult aspects. It's a very simple process almost entirely search and replace with a few
exceptions.

What is a Bitvector?
This tutorial explains what a bitvector is, and why one would be used anywhere in anything. It also
includes a brief explanation of what an extended bitvector is, and where they're necessary.

Working with your Skill Table
This tutorial explains how the skill table is organized, how to expand it if necessary, and how to add
a new category to the internal partitions of skill_table itself.