Thank you, you have doubled the fun I will have on my first time playing Fallout 3 with mods. (I played this a few years ago but I wasn't good at doing mods then.)
I used the math wrath icon from https://www.nexusmods.com/newvegas/mods/64868, anyone can do it, just add the texture to \Fallout 3\Data\Textures\interface\icons\pipboyimages\Perks and edit XX000EA7 formID in FO3Edit and add "Interface\icons\pipboyimages\perks\perk_math_wrath.dds" to the "ICON - Male icon filename" entry :)
Please confirm if 'ui_organizer.log' is in the Fallout folder. If it's not there UIO is not properly installed, otherwise check if the file contains the following:
36 comments
(I played this a few years ago but I wasn't good at doing mods then.)
>>>>> Processing file: public\pippong.txt
> Checking: pippong\pippong.xml
+ Adding: pippong\pippong.xml to: inventorymenu\