if you have a panel memory that is the beginning of a song, save the panel memory with synchro on.

save the whole file to disk with intro on and synchro on.

when you load the file, intro and synchro will be on, and if you don't want to start with the particular setup that comes up on load you can simply select any other panel memory for the beginning of any other song and intro and synchro will still be on.

if you have a sequence in the load you must make sure the panel write at the start of the sequence corresponds with the conditions in panel and panel memory you want, because sequencer reset is in effect another panel memory setup.