Well. This command makes an areafile from the files on your bbs.
This way your users can access the files on your bbs through the door.

BUT.. I never got around to finishing the job, so at the present time the
door is STILL a cd-rom door, NOT a complete filedoor!! Don't be fooled!
This command is realy useless unless you plan to finish my work for me.

(The reason why it remains unfinished is that there are many other
packages offering file_id.diz support and more, so I feel I might be
wasting my time with this..)