Now I’m getting puzzled. The entries you posted seem to be OK and I guess that the decal is OK as well (otherwise it wouldn’t appear on the nosecone). If you use these same entries in case of the nosecone, and the decal appears there without any problems, then it must also work in case of the fairing.
Do you mean DecalLevel? I already deleted the entries, but all I did was creating a simple green tga, then copied and renumbered one of the fuselage insignia entries in the decals.ini, modified the ‘MeshName=’ and ‘FilenameFormat=’ lines and increased the scale, so I guess the DecalLevel was 0. What is the level you use in case of the nosecone?