@soren , that's great that it works! Your post made me think of another post where someone said that they have spent more time installing the Raspberry pi than actually playing on it. It was quite the hassle to make it work but well I guess that's life, what is good usually takes some effort. Again, I am glad it now works for you =)
Please do not post a support request without first reading and following the advice in https://retropie.org.uk/forum/topic/3/read-this-first