Yeah the in-game action includes the icons XML. I've attached a zip with the atlas XLP, the icon defining XML, a few of the DDS/TEX files, Mod.Art and the modinfo file.
Everything else (moreorless) is fully functional, just no icons in-game. The icons work fine in the menu and player select screen, leading me to think that maybe yeah the front-end was fine, but the in-game was not. But as you can see the Icons XML is summoned in both of those cases, so I'm not sure. I'm thinking perhaps something is wrong with the icons themselves or their format.