two ways you can do this, both make you lose some current available icons
1. go to your customuifolder/images/icons
Add a file called icon_ms1.dds. This will replace the all the current icons. You can grab an icon page from like spells or items or whatever.
2. Open the ui\default\images\icons\icon_ms1.dds
copy paste some icons onto it. Save it in customuifolder/images/icons with the same filename
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