flashed the SetMainVersionLOW zip,
Now where do I go?
im still in the recovery menu
Woooooooo hooooooooo!
Now we should be able to run the Ruu which was your original goal!
So now that you flashed that! Lock the bootloader with fastboot oem lock. Then preferably be back in fastboot usb mode and run the Ruu! Follow the on screen prompts. After its finished you will be booted and stock and unrooted.

this should be done in hboot mode correct?