Hi,
I would probably use paper towels yes. (only because it might be easier to see any discharge compared to newspaper)
I don't know enough to advise you on the triple anti-bac - does it have painkiller in it?
Low and medium don't really tell us anything - stick a decent digital thermometer on both and let it sit for 30 minutes or so for the readings to stabilise if you can.
I'm also not sure if you should be trying to raise humidity or lower it.
Did you send these pictures to your vet? Could you ask their advice on the phone?
The last set of answers are really best left to a qualified vet who has actually examined the animal if I'm honest.
One question on the white looking wound on his back if I may - are the edges of the scaled area "rolled up" looking or are all the scales flat and then it just stops having scales?
The reason I ask is I've seen a snake where the skin had split and it looked an awfull lot like that but I can't actually tell for certain from the photo's.
**edit**
Doh old slowfingers McKilty was beaten to the punch again
**end edit**
dr del