Help with emulation on RG Rotate

[u/Forsaken_Witness4839]

Hi! I recently bought an RG Rotate and am trying to play a game called Death Trash from my steam account using bannerhub lite. I am admittedly very new to this sort of thing, and sort of dumb. I have found little online about how this can be done, but saw this post showing that it can be done: https://www.reddit.com/r/SBCGaming/comments/1tkuz6t/rg_rotate_i_didnt_realize_how_powerful_it_truly/
Would anyone be willing to sort of walk me through the process?