Final Fantasy Hacktics

This is my first topic so please forgive any possible mistakes 

What i would like to know is how to edit ,if possible, the age of Ramza in Character Bio in the Brave Story. I saw that in Journey of the Five he is aged 18 so i would like to make something like that to make him older.

Also i would like to make the JP spillover like 1-1 for all the chars so they all get the same amount of JP.