There is a CFG generator in pinned posts, although I would only recommend using it to add sounds and downloads.
Here's an example CFG; it's pretty sloppy, but it should give you an overall idea.
It's for FF2R, but Unofficial follows the same "formula."
Custom sounds should be 44100 Hz, 22050 Hz, or 11025 Hz. Use audacity for that.
For rigging models:
https://forums.alliedmods.net/showthread.php?t=324899