I wanted to know if anyone in the community has found a way to assign overlays from different eras to a normal game or MyLeague game.
Thanks to vetmin I was able to open the "overlay_packages.iff", but apparently it doesn't work by simply replacing the default ones with the ones that say, for example, 80s.
Example:
"titlecard" x "titlecardera80s".
"startinglineup" x "startinglineupera80s".
And all the other retro overlays like
retrohalftime1980player
retrowipe
retrostanding
etc.
If anyone can help me, I will be very grateful!

Thanks.