Make an item change weather in battle and the weather affects stats?

Is it possible to make a script that allows the player to use an item in battle to change the weather? I noticed that weather cant be used in battle and weather cant affect stats, so I would like these features to be included also and maybe change the background and parallax also?

If this is too much just say so, I don't want to force anybody to do anything

http://yanflychannel.wordpress.com/rmvxa/gameplay-scripts/field-state-effects/

Here you go.

This is perfect! except I cant use items to determine field states

Yeah you can, look in the instructions in the script itself.