Can you drive a 2001 honda insight with the IMA swith turned off? Will the 12v batt still charge normally?

Will the headlights still work and 12v batt charge as normal?

Why would you want to do that? Why buy the Insight to begin with? The short and sweet answer will be: No, don't do it, matter of fact: You're not suppose to do it at all.

What's the problem? What make you think or trying to gain/ correct something?