i am almost there...
there just are two problems.
it only works in lite-c so far. the plugin version still crashes and i don't know why.
and in lite-c there seems to be
some problem with materials so i can't display the light map. but i am 99% sure that the mesh loads correctly and both uv-maps are there.
<edit>
it works!
i still have the two problems but i combined lite-c + c-script to get the material working in the meantime.
(it's my ugly test level.)
</edit>