ISO generation

[Mkisofs] can be used to automate the making of ISO images from various files.

Command line example
mkisofs -iso-level 1 -o neogeocd.iso -pad -N -V "NGCDTEST" P1.PRG M1.Z80 SPR.SPR S1.FIX V1.PCM IPL.TXT ABS.TXT BIB.TXT CPY.TXT

With the IPL file containing:

P1.PRG,0,0 M1.Z80,0,0 SPR.SPR,0,0 S1.FIX,0,0 V1.PCM,0,0