OK, so as I am reading this - I need to use a brand new method for rooting my device, which means taking my device back to complete stock, then letting is use the ZergRush (love the SC/SCII reference there) and finally having a brand new, different root method on my phone? And then I can get the update and flash it with new radio, etc....
Wow, that is a lot of work for an update. But, I also had no idea that some phones were running newer OS versions than mine OOB _ I see the P3 has created an 886 --> 893, as well as an 891 --> 893 and an 892 --> 893. So, versions 891 and 892 must exist out there somewhere in the wild, whether by limited OTA updates or whether by newer phones being bought in the stores. Hmmm.
I wonder if I can get one of the direct updates from P3 and run it over my phone and see if it works or not? I'm going to (obviously) make sure that I have 1) a working Nandroid backup, and 2) an alternate rooting method (ZergRush sounds like a winner) in case the original root method breaks with .893....