I am asuming your console is already glitched so start your console using the eject button (default option on install) to start Xell Reloaded and after a few moment you will be presented with your CPU and DVD keys, take a photo of this with your phone or other capture device and also write it down.
it should look something like this https://www.youtube.com/watch?v=CZv1wfmp_RY
but please do NOT do anything untill you are confident with the task at hand.
yes your console is RGH2 but as Raja has sugested, If you dont know anything about your console i would do alot of research first before you update or ask someone who knows what they are doing to do it for you so that you do not kill your console.
before you do anything make sure you have at least TWO OR MORE good clean nand dumps in a safe place and you CPU key to revive your console if needed.
also with the corona you may need the nand read/write kit please do your research first and identifi your corona version and the parts installed on the board, and resistors bridged etc before you start.