-In the TDU Modding Tools, there is a ".2db to .dds" converter. Select the file that you wish to switch.
If you have Photoshop, continue at two steps ahead. If you don't, keep reading.
-If you don't have it already, download GIMP ( http://gimp.org/ ), and then download the .dds plugin ( http://registry.gimp.org/node/70 ). Place it into Program Files/GIMP/Plugins (I think), or wherever GIMP is installed to.
-Go into GIMP and delete the black spots. I suggest using the Magic Select Tool and clicking on the black spots, then using the eraser tool to more freely erase them, without worrying about erasing other stuff. NOTE: I'm not sure about this step, because you may need to match the color of the window itself.
-Once you're done, export as a .dds, and then go back into TDU Modding Tools and change it back to a .2db file.
-Use the .BNK repacker to replace the original, and hopefully it'll work.
-Leadfoot