Some chat on the Cubasemidi Mailing List :
Question : wìth VST, can someone trigger punch in with a pedal, like with good ol' multi-track recorders ?
Answer: well, first you'd need a pedal that'd be a midi controller, and then there may be a way to assign that controller to the "Record" event for a value and the "Play" event for another value with Cubase's remote control option. Since I'm not familiar with this feature, I may be wrong but that'd be where I'd start?
And it works ! For those interested :
Thanks to Serial P., thanks to Denis, happy music to everyone !