In the prebuilt repo now is dCore-java-installer for x86, works with dCore and Ubuntu dCore. It brings up a browser of your choice, you download the JRE (the Linux x86 .tar.gz version, not the RPM), then it creates an SCE along with firefox plugin and desktop files and icon.
Instructions:
$ importsce dCore-java-installer
$ loadsce dCore-java-installer
$ dCore-java-installer