DSTFMOD: Randomly play one sound and loop another

[Sukaiba]

So while making a music mod I've gotten into the habit of making two sounds per Multi-Track Event, an intro and a loop

However this format is incompatible with Simple Events, that CAN do randomization, but they only allow you to loop a single sound, or you'll be forced to shuffle/sequentially advance the playlist

In short, I'm trying to find a way to:

In an Event, Add 'A_intro', 'A_loop', 'B_intro', 'B_loop' sounds,

Let the event choose between A/B_intro, and then proceed to repeat its respective loop sound

Is this possible with FMOD itself? Or by messing with the 'modmain'/'dynamicmusic' scripts?