[XP] Running a common event before using a skill

Sorry, my first post; I'm a noob, please bear with me.
I don't know if this is possible using only events or if scripts are required also, but....

Anyways, what I would like to do is to run a common event before the actor uses their skill. At first, I simply tried setting the common event in the skill section, but I quickly learned that common events run after the skill is performed.

I tried to do this using common events ---> force action, but I realized that it wouldn't work since I'm using the unlimited actors script by albertfish, (which allows me to switch the formation of my party members) and the GTBS script by GubiD. (Allowing me to have more than 4 actors fighting.)

What do I need in order to accomplish this?

I'm not familiar with those scripts, so I might be wrong, but I'm not sure that there's a way to do it with events. However, it's possible that the GTBS allows for such an action, in which case you'd need to look through that script and see if it is mentioned in the instructions.

Otherwise, you might need to make a script request, but there aren't a lot of XP scripters on this site.

Alright, Thanks.
I'll look into it and see if I can find anything.