1. Create a new folder under *Everquest II\UI\*NEW FOLDER HERE*
2. In that folder create a new folder called 'sounds'. Your (simplified) folder structure should look like;
\Everquest II
\UI
\*NEW FOLDER*
\sounds
3. Copy
this file into your new sounds folder.
4. Next create a new text file and copy/paste these lines into it changing the *NEW FOLDER NAME* to whatever you called your new folder;
cl_movie_enabled 0
cl_ui_skinname *NEW FOLDER NAME*
cl_ui_subdir UI/
5. Save and close this new text file into your Everquest II folder making sure to change the name to 'eq2.ini', it is important to make sure the .txt is not left on.
If she is already using a mod then simply create or see if the 'sounds' folder exists and save the step 3 file into it.