Baseline (Widescreen) Solution & Issues
Here's how you can set it up for 1680x1050 (native 2005FPW reso)
Go to your everquest folder and edit eqclient.ini
Look for [VideoMode]
Under that, look for Width=, set it to 1680
Then look for Height=, set it to 1050
That's it.
Ultra/Super-Wide (21:9/32:9) Specific Solution & Issues
Eyefinity / Surround Specific Solution & Issues
4k UHD Specific Solution & Issues