The problem is with the Java library that GWS uses has the fingerprint of IE and that is rejected. There is no way you can generate them certificates.
I was playing with this yesterday and I’m not sure you can generate the .tpk files with GWS anymore. I ran out of time. If you have a .tpk file you can use Tizen Studio to generate the Author and Distributor Certificate and use an old Fit2Installer to push them on to your watch.
Ron
Samsung Developer Relations