This is what it looks like in my FSX with the original prop discs.
& after I replaced the texture named Prop_Lancastrian.dds with the prop texture from an FSX native aircraft in my hangar. (Psst, a Bristol Beaufighter )
This is a little trick I often use when converting FS9 aircraft to display in FSX. It works well on the Lanc but please note that it's an FS9 model & the props will still disappear behind clouds. Nothing you can do about that.