If your INI is pointing to the desired custom UI directory, running the eq2Maps Updater will create and download everything you need. Just run the updater and you should be ok.
If you're using the manual install, directory structure is as follows...
Everquest II
|_UI
....|_Custom UI
........|_EQ2Map
........|_Images
............|_Icons
............|_Maps
The EQ2Map (no 'S') directory should contain a long list of XML files.
The Images/Maps directory should contain a long list of DDS files.
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