you have to follow this :
How to customize:
1. create temporary folder "myAtlas"
2. create an ISO:
2.1 create folder "cd" in "myAtlas" and
put the 16 files and folders of Atlas in:
0.bin (required)
ABS.TXT
ATLAS.CEL (your custom)
ATLAS.MAP (your custom)
ATLAS.PAL (your custom)
ATLAS.TXT
AUTOSTART/
AUTOSTART.INF
BIB.TXT
CREDITS.CEL (your custom)
CREDITS.MAP (your custom)
CREDITS.PAL (your custom)
CPY.TXT
FLD_KNL.BIN (required)
README/
README.TXT (your custom)
2.2 download and extract Mkisofs.exe and Cygwin1.dll
into "myAtlas"
2.3 create file "MAKEISO.BAT" into "myAtlas":
mkisofs -quiet -sysid "SEGA SATURN" -volid "SaturnApp" -volset "SaturnApp" -publisher "SEGA ENTERPRISES, LTD." -preparer "SEGA ENTERPRISES, LTD." -appid "SaturnApp" -abstract "ABS.TXT" -copyright "CPY.TXT" -biblio "BIB.TXT" -generic-boot ip.bin -full-iso9660-filenames -o myAtlas.iso cd
2.4 add game data
for each game add data into "cd":
(see below how to create)
"GAMENAME" <- folder with all files on game CD
"GAMENAME.IPI" <- game ip.bin
"GAMENAME.CEL"
"GAMENAME.MAP"
"GAMENAME.PAL"
"GAMENAME.SPR"
"GAMENAME.TXT"
"GAMENAME.AIF"
2.5 put Atlas' "ip.bin" into "cd"