ok, i and many other players have bug where certain maps are missing, through trial and error i have found way to fix it
1. zone into a connected zone <but not the zone of the map that is missing>
Example: Butcherblock Mountains is missing, so zone into greater faydark and make sure your map window is closed!!
2. alt-tab outta eq and go to mapfiend.net now, delete all butcheblock files in your everquest map directory.
3. download the 3 BB mountains files, after download make sure each file is there by opening it up and viewing the text in notepad. Save before exiting each file.
4. alt-tab back into EQ and zone back into butcherblock. DO NOT OPEN UP MAP WINDOW UNTIL ZONING BACK INTO THE MISSING ZONE!! THIS WILL DELETE THE MAP FILE'S CONTENTS
5. open your map window up and you should see the map now.