I don't think that pedal is capable of the desired result.
Ideally you would be looking to have RB sync to another sequencer clock you could use to control Play/Record as well as know where you are in a song.

If there is a standard MIDI message that can trigger recording of audio (send computer keyboard messages) that this pedal could use, I don't know about it.
/Wouldn't surprise me if forum member Pipeline knew of something though. <grin>

1. Can you give yourself enough lead in when you hit record that you can comfortably get ready?
2. Do you have a spare keyboard that you can rip all of the keys off except the R and the spacebar? A few of us have gone to the extreme of using such a Frankenstein solution as a foot pedal.
Makes Start/Stop/Record pretty easy.
3. Would a wireless keyboard help? If it could sit somewhere more convenient and you just reach over and tap 'r'

just trying to help
smile

Make your sound your own!
.. I do not work here, but the benefits are still awesome