These two following files, are markings.bmp and markings_a.bmp..
I used a custom marking and therefore, had to make these two BMPs to display nothing, by just erasing everything in it. Thus, in order for the IL-2 winter camo skin to show properly, u will have to use these two BMPs also, which will effect some planes that use the USAAF markings and the Canadian 'maple leaf' marking.
If you want to still use the markings on other planes, find textures named markings.BMP and markings_a.BMP, and black out only the VVS red star marking.