Maybe I had a great idea, maybe can't be done...For all my songs I have used great Nashville Session players and have final recordings.

Can MY STYLE of music with session players and a final MP3 be MADE A STYLE ?

In other words: Can my original MP-3 tracks done with my Nashville players be converted to a STYLE and I can play that STYLE on KORG PA series?

Example can I make STYLES from my tunes like these?

New York City Cowboy

Holdin' On

Spread Your Wings & Fly

If I can do this it would be a game changer if I could play my songs as a STYLE from my original recordings with my original session players...

Can this be done guys ???

Not 100% sure but I would say MP3 NO.....
SMF conversion yes..

https://www.youtube.com/watch?v=BO252Dx7tqk

I don't know any way to make a style from an MP3. It does pretty well converting midi files to styles.
There may be a way to assign four different MP3 segments to the multipads and use them like styles.

Sounds like you're a KETRON candidate!