Great!
Actually a lot remains to be done.
If you fly lower, you will notice a lot of glitches, including crashing into terrain that's appears to be lower.
The last change I did was disabling a rather important function, which is to feed small dummy textures (that's what dummy.tga is for) to the engine for textures that are loaded by il2ge.
Without that enabled, texture memory is wasted, because textures are loaded twice by il2ge and the il2 engine.
For some reason this function led to crashes for SAS~Storebror - I'll have to investigate why.