sorry, but I never heard before about adding a blurred propeller texture as a weapon. What kind of files are the ones you listed above?
Let me clarify that, with "inexhisting prop blurred textures", I meant that there is not a separate texture file for the blurred discs among the texture files.
This means there is no mapping to a texture file for prop disc in the aircraft *.mdl file and the blurred texture is painted directly in the *.mdl. More or less as in the old CFS1.
FS2000/CFS2 represented a step forward by adding blurred prop texture files for each stock aircraft in the main program root \TEXTURE folder, "prop_us.bmp" and "prop_japan.bmp". Addon designers added theirs directly in the aircraft \texture folder, but each prop texture can be moved to the main \TEXTURE folder gaining a small framerate benefit, providing each filename is unique.
This is the way Alphasim handled all of their early models and also why I was never able to produce a single alternative prop disc for Alphaoldies, as in this SM.79.