Not sure if anyone noticed this. I linked to it at the bottom of the simple update thread.
I take no credit for this whatsoever.
Here's the original discussion as started by user "tadpole" on mydroidworld
.602 rooted without SBF'g or wiping!
It worked perfectly for me. Here's the steps I used. So much easier than .sbf'ing and restoring and all of that.
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I was on stock .596, rooted.
I installed Droid2Bootstrap. Booted into recovery and created a Nandroid. Booted back and unfroze anything I had frozen with Titanium. I did not restore stock Swype. I went to system update on the phone, accepted the updated and chose to install. Phone rebooted and started installing the update. I didn't see that said it completed, but I might have looked away. It definitely just rebooted back to android on it's own, even if it did tell me it completed. As I was rebooting, I did a battery pull. I then put the battery back in and it rebooted into CWM recovery. I installed the superuser .zip file and rebooted again. After a much longer than normal wait, I was back into Android w/version 6.02 and .13p radio. All of my programs and settings fully intact.