So, to be clear (gimme a break, it was my birthday yesterday, so yes, ** I was born yesterday **), does this method address R2D2 users on Android 2.3.4, System 4.5.622.A957.Verizon.en.US, who would like to root? (Hint: like me?)
I hesitate to do anything SBF-wise since others have noted a new problem can occur when attempting to roll back to earlier ROMs, especially after the 2.3.4/4.5.622 OTA successfully installed over my stock SBF-flashed 2.3.3 device and has been overall working much more smoothly than VZW's prior stock software ever did (stock and rooted alike, was much more buggy before this).
No urgent, desperate desire to root my R2D2 immediately, just waiting til somebody more skilled in the kitchen says it's ready. I miss my Titanium Backup Root & AdAway apps more than anything else root-wise, and of course I'd like to rename the bootanimation script's "Spunky Attitude OGG" ringtone so it can't fire at startup (the original reason I rooted this device shortly after purchase).
Rather not sweat through another unbricking session like I encountered when preparing to SBF & take on the 4.5.622 OTA, if it can be rooted "painlessly" ... So any R2D2 owners braver than I, please? (Steps back)
Garbled Subspace Transmission from R2D2
[EDIT]: *derp!* Sorry, Silver6054, just found your recommendation here (post #11):
http://www.droidforums.net/forum/showthread.php?t=203326 re SBF issues etc...
I'll keep hunting and remain calm, patiently awaiting good news.

K