How do I disable the hardware buttons on my CanoScan LiDE 600F scanner?

I'd like to completely disable the hardware buttons on my CanoScan LiDE 600F scanner. I never use them, and they are constantly getting pressed accidentally. May need a registry hack. I'm talking about these buttons (different model, but you get the picture). The CanoScan Toolbox Settings only lets me reassign their functions, not disable them completely. I've checked on Canon's website, and I have the most up to date software. Can I edit settings in the Registry to do this? E.g. I can see the button assignments in Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Canon\CanoScan Toolbox Ver5.0\

Question by francois on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.