Jano: "we could also adjust createrpm.sh to create eiher redhat or suse packages..."
There is no need to do that. As I said take a look. You will get the idea...
If you want I can provide a .ymp file for one click install (opensuse standard feature) for 12.2,12.3 and 13.1 (x32 and x64). And .ymp file for git compile too. Just put that file on your page and point a link to it. That's all