+521BD0: Ascii name of hero
521BE0: 400 - Experience Points (enough for level 8-9)
521BE4: 09 - Leadership
521BF4: 09 - Morale
521C04: 09 - Fear
+521C82: Ability Points
The (+) addresses are important. Search the memory for the 'name' address using MTC, offset in GH to get the right 'ability' address and increase it to 80. Increase every skill and change Leadership, Morale and Fear to 9.
There is much more to get here, but I started with a Paladin and every chaper only my 2 Warriors joined me. A Wizard or a Priest might have given me more insight to spells like Bravery, Fear, Fortify, Phantom Steed, etc.
One last word: If you conquer too many neutral castles the other parties get upset as they can't expand. To finish a chapter you can always conquer them all.