Really? Is there a FAQ on that somewhere?
No FAQ AFAIK, but they are just standard text files. Here's the entry syntax:
filename::NSF,[1 based songno|$songno],[title],[time(h:m:s)],[loop(h:m:s)][-],[fade(h:m:s)],[loopcount]
Here's an example list:
# Solstice (CSG Imagesoft) [1989]
# Composer: Tim Follin
Solstice (1989)(CSG Imagesoft).nsf::NSF,$06,Title - Tim Follin - Solstice - ©1989 CSG Imagesoft,2:57,,1
Solstice (1989)(CSG Imagesoft).nsf::NSF,$01,Begin - Tim Follin - Solstice - ©1989 CSG Imagesoft,26,,1
Solstice (1989)(CSG Imagesoft).nsf::NSF,$02,Main Theme - Tim Follin - Solstice - ©1989 CSG Imagesoft,112,113,7
Solstice (1989)(CSG Imagesoft).nsf::NSF,$05,Ending - Tim Follin - Solstice - ©1989 CSG Imagesoft,81,,1
Solstice (1989)(CSG Imagesoft).nsf::NSF,$04,Success - Tim Follin - Solstice - ©1989 CSG Imagesoft,18,,1
Solstice (1989)(CSG Imagesoft).nsf::NSF,$03,Failure - Tim Follin - Solstice - ©1989 CSG Imagesoft,12,,1
Solstice (1989)(CSG Imagesoft).nsf::NSF,$07,Unknown 01 - Tim Follin - Solstice - ©1989 CSG Imagesoft,168,,1
Solstice (1989)(CSG Imagesoft).nsf::NSF,$11,Unknown 02 - Tim Follin - Solstice - ©1989 CSG Imagesoft,10,,1
Solstice (1989)(CSG Imagesoft).nsf::NSF,$12,Unknown 03 - Tim Follin - Solstice - ©1989 CSG Imagesoft,4,,2
Solstice (1989)(CSG Imagesoft).nsf::NSF,$13,Unknown 04 - Tim Follin - Solstice - ©1989 CSG Imagesoft,4,,2
.