Found on other Forum, hope this help ;).
...to use multiple skins first give a name to the material you used for skinnig your plane for example "fuselage"
then create a file named yourplanename.skins in your shapes folder
in this file put that
CITATION
models
{
lod = {"yourplanelomfile", 1000000};
collision = "yourplanecollisionfile";
}
argument
{
argument = 70;
skin
{
value = 0.0;<== First skin
material = {"your material name", "Standart", "skinfile1.bmp"};
}
skin
{
value = 0.1; <== second skin
material = {"your material name", "Standart", "skinfile2.bmp"};
}
}
That's all folk
depending on the plane you choose you may need to modify your MEINIT.XML to add more skins slots to understand how to do that go here and search for adding skins in this forum.
Good luck