Thank's for your help!
The top texture is aligned, now I have to do both sides and the bottom.
I extra made left and right separate surfaces (KA-50 has a asymmetric fuselage), but after using the lwo2eeo convertion and back again with eeo2lwo both sides are put together to only one surface. I test this convertion sometimes before making new fixes, to see if it's still possible to convert and all is working like it should.
I once had done a lot of hard work and wanted to convert it but there was a 2-point polygon in the model and I wasn't able to find the surface which was mentioned by the converter. After 5 hours of trying to fix it I gave up and started from scratch again.
Must have been a supersmall surface somewhere inside the model, and there was no way to find it for me with my knowledge.
But with only one surface I have to manually separate the both sides again before I can make the UV-mapping for the textures