Set Everquest to 1280x1024 resolution before doing the following:
1. While out of game or logged onto a different character, download the .zip
2. Save to Desktop or elsewhere accessable
3. Open it and copy the deltax folder to the somepath/everquest/uifiles/ folder
4. Download the UI_Dyfrin_Fenninro.ini and rename it to your characters name and server. *If your browser opens it as a webpage, copy the contents and paste into your UI_Name_Server.ini and hit Save.
5. Move it into your everquest/ folder
Preview:
*Click picture to view full screenshot, with notes