DOUBLECAST ABILITY

I'm sure this has to exist already, but I have a character who I want to have a technique which allows them to cast two spells during the same turn they use it. The game uses the basic combat engine, so it doesn't have to work with a custom engine.

Here are the specifics of how I'd prefer it work.

-When you select the ability, it immediately opens the magic window and allows you to select the first spell without going to the next character if they aren't the last party member character, just like it does if you have multiple actions.
-When you pick the first spell and target it should then immediately open the magic menu again to let you select the second spell as above.
-Upon reaching the character's action, it should just cast the two spells in the order you input them with the selected targets. (Kind of self explanatory, but I included it to be complete).

I'm hoping there's a not to difficult way to do this... but I'm not actually sure what it would be, so I was hoping someone had some ideas, or a script which does this already.

VX Ace

Yeah, I know about that. But I wanted a specific ability that let you cast 2 spells, and ONLY spells, on the SAME turn you activate it. That's a lot trickier to do.

Thank you. I might do that.