I don't know how to import my custom rider skin into MXB

[CrimsonYZ]

Hey, so i'm gonna make this short.

My gear's components (rider.tga,rider_n.tga and rider_r.tga) are all done and ready to go. The issue is, that whenever i try to load them into PaintEd, they don't show up in the little gray preview box, and my gear is completely black in game when i equip it after compiling the 3 .tga files into a .pnt file.

If it's important to know, i used Photoshop, and converted a .psd file into a .tga file by just renaming it.

How do i fix it?