possibly missing song.ini info?

[SkyJumper409x]

(Note: i use * as a placeholder; I am not sure if this is missing info or a lot of incorrect tags that I somehow have)
A good chunk of the clone hero conversions of gh3 have unlock_* tags, in addition to the normal unlock_* tags, that start with unlocks_* and unlockc_*. I have 137 songs with unlock_* tags, 45 of which have these unlocks_* and unlockc_* I cannot find any information on these. do these mean "unlocksolo" and "unlockcoop"?