I was struggling with the exact same thing. Flashing the OMC recovery to your SF2/TMV is not a good idea, that's for sure.
Seeing as the two OMC recovery files (the one in the "unlock/files"-folder and the one in "preperation") are identical, I think the SF2/TMV recovery files should be overwritten to both these folders.
Progress of sorts. I did as I described i.e. copied the OSF2 "recovery.img" file from the "unlock/files" folder to the "Preparation" folder and followed step 4 again. Now at step 5, instead of getting permanent green Android I find:
1) Removing the battery and powering up with VOL DOWN pressed, I get a vibration, followed by green Android, followed by the screen blanking, repeating forever.
2) Ditto, but quickly insert the battery after the first vibration, now finally progresses to the FTM screen.
3) Don't plug in the USB cable, just insert the battery and power on while pressing VOL DOWN. Also goes to the FTM screen.
I guess (2) may indicate my USB port isn;t feeding enough power, although I'd have thought that was standard.
My new question is therefore: what is the significance of powering up just on USB rather than battery? Outwardly it seems to do the same thing?
PS if I'm right about copying the "recovery.img" maybe the tutorial needs a tweak? I know this stuff is obvious if you've already done it.