How much change in the code would be needed to disable PoW for Peercoin?

I was just wondering if it would require a lot of change in the code to disable Proof-of-Work for Peercoin. My guess is no, but I would like to know practically if tomorrow we decide to disable PoW if this is quickly doable and if a clean release can be pushed accordingly immediately.

Maybe it would be a good idea to make the changes now in preparation for this, so that just a variable can be set to ‘FALSE’ (i.e. PoW=false;).