About changes and/or combining Hero Specializations.

Maybe I'm not the first to come up with this, but I have an idea for an experiment. I was recently messing around with poisons and noticed how the amount of damage inflicted by Poison is defined for Assassins and Manticores. (I used to think the latter just had Animal Poison, like Wyverns, but it's actually a third type altogether...). Basically, the question is, can you, knowing how or what, enter new values into the RPG file? In other words, there's Regeneration for Hydras, and it's defined specifically as a Regeneration value for Hydras, not Regeneration as an ability. What if I try to do the same for my Cyclops and set a different value? And if that works, can I enter the missing data for Hero Specializations and Skill effects in the corresponding sections? --- -- *I will, of course, test it, but I'm also interested in the opinions of others (I don't think I'm the first to think about testing this).