BJ96! do you possible know something about these file format:
RFNT
FINF
TGLP
I found those in Common2 in MiscData[9] and MiscData[10].
and more funny thing, MiscData [11 - 17] is modules, 11 is the Sora_Melee module O.o
and [30 - 34] is something about "sndBmgTitleData"
Font files.
As for sndBgmTitleData, I believe that's what links the song names and the songs files. (For each language; PAL version has 5 files.)
EDIT: I guess it would be interesting to note that snd_bgmSysData ties the song IDs to the stages' playlist. And I think it also contains default appearance value (00-64, the value right after the song ID).
To make viewing more convenient, switch to 12 bytes per row (the lenght of each entry).
Also, is one of the bytes hinting towards which song is and isn't unlocked from the start?