From the website:
http://newui.technosapien.net/
Instructions for loading skins/mods in game:
1. Go to the uifiles directory in your Everquest folder, Right-Click on the DEFAULT folder there, and select "Copy"
2. Then Right-Click in the same folder as default (beside it) and select "Paste"
3. Re-name "Copy of Default" a new name, keeping it short
4. Download the file you want and un-zip them.
5. Drag all the items in your un-zipped file folder into your new folder, (you just named a short name) it will ask you "do you want to copy over...." select "YES TO ALL".
6. Log into Everquest
6. use /loadskin <folder name> (this is why you keep it short)
****If your using a SKIN Mod, you must then camp out and back into the game to see it****