I guess you mean that e.g. in a DJ mixed cd, sometimes the mix is cut into pieces as seperate tracks, but they are actually part of one large song (dj-set, liveset, ...). Then these seperate songs would have to be tied together as a tied group?
(and you would also like to make a tied group for any songs you want always to be played together)
Is that correct?
If MM would play one song of that tied group, would you then like the other songs to follow, or would you rather like that MM begins from the first song of the group, and after that one the other songs follow.
say MM starts song 4, would you like to play 4, 5, 6, 7, 8
or would you like to play 1, 2, 3, 4, 5, 6, 7, 8 ?
Anyway, that's just a detail that could be set as an option.