Its possible though I dont have a pointer chain that works reliably for me. It is a short +10 (I believe) from the start of the Character block used for Recruit Character. I used a different technique to locate the address but I believe saeri at gamefaqs has a table for locating the pointers for recruitment. Values 264 and above map to solder classes and eventually cause a crash
Most annoying so far is the Runemaiden one, i've gone to all the different recruiting places and there aren't any. I'll see if i can hack this - would like to complete all quests (although i've missed out on At Hatred's End because I sided with the wrong person at the end of another quest grr.)
I trained Haralla (lastremnant.wikia.com/wiki/Haralla) into a Runemaiden; the requirements for the class are "Item Arts and Mystic Arts equal, Staff usage high" and nonexistent item arts/mystic arts are equal
Warriors can be found all over the place (either soldiers or leaders) after a certain point in the game and I recently picked up an Adept Commander in Athlum (lastremnant.wikia.com/wiki/Aquarius)
the reason i wanne hack the classes is becox i keep getting classes that cannot switch the combat arts like i am using dual wielding and i can only use dual wielding arts and not one handed arts or power grip arts.