It worked! Huzzah! The guidebook I used is found here:
http://wizardportal.dyndns.org/eqemu...uidebook13.zip
If anyone else reads this post and wants to know the solution:
1) Get a dyndns forward name to your external IP.
2) Follow the instructions for Running a server with a NAT, which consists of changing a couple server files, and a couple files on each client inside your LAN.