Feel free to post this in the topic next time, though your detailed information works just fine here (I suppose).
Something like this doesn't seem to be hard, but formatting it to look appealing (In other words, scrunching the new field in) might be the true pain of all. Find all instances that talks about the four values and then add two more of them. The script terms for those attributes you're searching for are probably 'maxhp' and 'maxsp' (If not, remove the max).
And me actually modifying the script? Oh, I fail at that. I only thought of a concept. D: