Here's my BFZ (short for Black Fogged Zone) zonerect Calculator. It's an in-game tool used to figure out zonerects for SOE's default outdoor mapped zones (Antonica, TS, Nektulos, Commonlands, EL, etc.).
You put the attached XML in your eq2map folder. Once in-game, click the little Question Mark button on the top right of the Map window (formerly the Help button). The window will expand to the right and show a kinda crazy grid of 0's and 6 buttons labeled Step 1 - Step 6. Hold your mouse cursor over each of these buttons for instructions.
EDIT: Updated the attached XML. If you downloaded before 8:07 PM PST 2/28/05, redownload.