Ok, no walkthrough for installing BURG, so tough...plenty out there. HOWEVER, I wanted a custom background for the "radiance" theme I was using. Sure, can customize a new theme entirely, but the look and feel of radiance is good enough...just needs a new background.
1) Terminal, need to "explore" to the location of the current background...
2) Go to
and open up the theme you want to change the background for. In my case, this is "radiance".
3) Open up background.png, and mess around with that. Ideally, you want the same "details" as the existing image so as not to have a weird, distorted image:
4) That's it! Reboot and be surprised at how easy that was.