Skill that makes enimes weak to various elemental attacks

I am currently changing my game from RPG 2003 to XP (Rebooted my computer, since I lost it, might as well upgrade if I'm starting from scratch)

The problem that I have run into is that a KEY part of my battle system involves skills that lower enimes affinities.

Examples
A water spell that makes lightning spells more effective
A Gravity Spell that pulls flying enemies down so Melee attacks can be effective

I could do this easily in 2003, but I can't seem to find the command in XP

What you want to do is add a state change with the elemental skill, and have that state effect what element they are now weak to. First, create the state that you want. For that water spell of yours, you'll want to make a state that simply lowers the lightning element defense for two turns with 25% chance. Then, make a skill that deals water damage and applies that lightning weak state. You can do all of this in the database. :3

Edit: Actually, I'm wrong. You can add defense but not weakness in the state tab. Give me some time and I can find a way for you.