Here is my first try to modify a hack.
I tested a lot, and i think it works.
In the txt you find all the instructions.
What this do?
The original personal shop, allows to have an item the don't do nothing in battle. With this hack, you can build items with bonus in battle (the bonus is in the attack now).
to prevent a user make an item with bonus 9999 selling it at 1 gil, the hack put a cost on the item.
a user spent X gil for 1 point of bonus (the x, is now 10 gil, but it can be modifyed in the admin CP in itemshop options)
to prevent a lvl 1 user, use an item with bonus +1000, the hack set a level for the item (level to use= bonus damage/X) where X is set by the admin by admin CP. Now i set this to 100.
I hope this help you to make more fun your rpg
P.S: If you have trouble, message me. It' s the first time, i modify a hack (really is the first time i program in php

) so be gentle :P