Sure, I'll look for it.Can you send it to me on PM?
Why wouldn't it be useful? You can therefore have 72 songs in total (the default 36 FIFA 14 songs and 36 other songs).Afaik, FIFA 14 by default has 36 songs, so that trick wouldn't be useful for me, even if I'd be forced to delete one or 2 songs, which I don't think so.
However about "copypasting" into .sbs file, I wouldn't be shocked in .sbr file contains some metadata like song length. I experienced that messing around with FIFA 11 soundtrack when just copypasting compatible 2010 WC songs, made music stop after the first song. Back then, there was a .big file containing such metadata for every song separately. In FIFA 14, I suppose, all are packed into 1 file.
Maybe I'm wrong, but sure, I'd like to know more details, so you can write them in PM as well
And if in fact it is possible to add/expand more entries to the database without issues, you could then double the amount of songs in the database.
For example, if you can add 80 songs to the database (songplaylistlinks and eatrax) without encountering bugs in the game, my trick would then allow to make it 80×2 = 160 songs. Not that this is always necessary, it's just a theory and something you can do if you like.
Anyway I'll PM you and explain you this (simple) trick further if you want.