You don't have to anymore...Zeffie's ZE13 is out and requires a stock CL14 and uses the Sprint tool to do the flashing now.
Pretty awesome work.
Just did the new procedure.
datatool backup
Shut down.
Get the Sprint utility, _follow_ the directions.
Flashed to the Sprint CL14
Followed Zeffie's instructions
Used Sprint utility to flash ZE 13+ release of the kernel
Datatool restore
Installed SetCPU
put the setcpu.txt file as recommended on the ZE wiki
Setup all the new speeds.
Rebooted...it's snappier now.
I set max speed for 1600 while charging/plugged in
Too early to say how it will work out, but it all flashed like clockwork.
I didn't link to Zeffie's pages because I don't know all the politics of late and didn't want to stir the pot.
*** Don't do the overclocking, it resulted in instability...read current Zeffie's instructions at
http://www.midnightchannel.net and
http://wiki.midnightchannel.net/ for current progress and instructions