I noticed this was added in during one of the recent updates and its really great, I setup my own SNMP monitoring template a while ago with what looks to be the identical HP SNMP libraries.
One thing I noticed though is that all your temperature channels are taking in the value of their HP set limit and putting it as their Error value. The problem with doing this is that by default HP servers are usually set to automatically shut down when that value is reached, not go above which is when PRTG would show an error. It's quite possible that you wouldn't see the temperature channel go to an error state, and most likely you won't have time to react before the auto-shutdown begins.
I set my template to take in the value and then I reduce the error value to 5 below the shutdown limit, and the warning value to 10-15 below the shutdown limit to give me more time to check on an over heating system and shut it down gracefully if needed.
Great work though, I'm hoping you'll also Add Memory and Drive/Raid Array status next as I have templates for them already but it can be a pain to setup many of the channels and sensors.