Update to the latest (4.3) then unlock and then root.
The rooting, recovery and rom's are all designed to work with the the most up to date bootloader which can only be updated through the official update.
So update to 4.3 then go from there, safest and easiest way.
ASUS Transformer TF701
: CM 10 something or other.
: SPL 1.76.2007
Only use this phone for my XBMC remote
I keep needing this
Rogers Dream - with root
Dead battery, my kids get to use it as a toy phone now