I downloaded but have not yet extracted Killer Queen. I will definitely get the BoRhap as well if the pieces are available.
Queen is my absolute favorite band, so this is super cool. I've already done one cover (Seven Seas of Rhye with guitar, bass, piano as collab) and this would give me a great launching pad for doing something interesting with another Queen tune - awesome for learning what goes into these arrangements - how much of the stuff you don't hear (or do) depending on how the voicings are mixed, the layers of vocals or guitars - the knowing "ah, so that's what his drumkit sounded like, *blech* - geez if THAT sounds good on an album and "all that background noise" is ok, I have nothing but my lack of talent (not equipment) to blame for my tunes!

Appreciate the links to these - I'll have plenty of fun with them, I'm sure.