@Aragorne-64 Welcome to the Rockstor community.
Yes, our installer is the exact same one. But we are very shortly to release a new installer by way of a re-launch of sorts. We have spend the interim time transitioning Rockstor to be based on openSUSE instead of CentOS. So upon that installer being released I would be very interested to see if you have a better time of things. I suspect you will 
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The following thread has the most up-to-date info on our openSUSE endeavour and we have just reached beta stage for those testing channel (āBuilt on openSUSEā only) rpms:
But as stated there is no Rockstor specific installer just yet. Still in closed beta trials.