Okay, looks like it should just be two easy steps.
1- add the line
<include>eq2ui_myUIStyles.xml</include>
To eq2ui.xml. (Before the </Page> line, naturally.
)
2- copy
eq2ui_myUIStyles.xml from the MyUI folder.
That should do it. Let me know whether or not it works, or if it partially works but there's still something else that's not right.