If you don't like the text displayed when the "HELP" command is used (e.g. if you want to add your own help information), just globally override the "HELP" command, and get it to display a text block in the help window using the helpdisplaytext command.
For example, in the game definition block:
command <help> helpdisplaytext <helpguide>
Then, write your help guide in a define text <helpguide> block. Now when a player types "HELP", the "helpguide" text block will be displayed in the help window, rather than the default Quest Quick Help guide.