Pand

The load screen is one single bitmap. Edit it as you wish.
My Loadscreen is just... black... with a big fat LOADING.

The trouble begins if you want to patch EQ again.
Your only chance to make it work is to always run EQ without the patcher and use a batch file to launch the patcher when you do.

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copy C:\Game\EQuest\Resources\SOE_loadscreen.jpg C:\Game\EQuest\Resources\loadscreen.jpg
cd C:\Game\EQuest
EverQuest.exe
@echo .
@echo After patching is completed, press the Any Key to restore my loadscreen.
@echo .
pause

copy C:\Game\EQuest\Resources\loadscreen.jpg C:\Game\EQuest\Resources\SOE_loadscreen.jpg
copy C:\Game\EQuest\Resources\my_loadscreen.jpg C:\Game\EQuest\Resources\loadscreen.jpg
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MY batch file also restores/kills the default zone maps from EQ so they dont clash with my preferred colour scheme for maps but I removed those parts for better clarity.

The Login screen, patcher skin, or whatever, work in the exact same manner. If it's not in the actual UI folder, you can not change it without conflicting with the patcher.