How to add a new Imagery Server

For some swedish regions supports better sat-images than bing.
How can I put an addional image server into josm?

I have a tile downloader which I tested with jmapviewer.

first question that has to be answered:

do you have permission to use that sat-images for OSM purposes?

What is the licence thais used to publish theit sat image data?

I agree with stephan and i think you need to license to publish these images for OSM. i hope you can understand what i am saying.