1) Parent romsets usually mean clones of an existing game. 2) The M1 can be used as is (I think). The 0,20000, specifies the rom data to load. 20000 is the file size in hex. For the M1, this doesn't have to be changed, unless the M1 rom contains double data and has been later trimmed down. 3) All Neo-Geo roms have a 3-digit cart ID. For NAM-1975 which was the first Neo game released, has a cart ID of 001. 4) The reason why KOF2003 isn't emulated in Kawaks is because Kawaks uses the Asr.dat to specify what to load (namely the roms). The data architechture inside the P1 weird. MAME emulates KOF2003 because it's drivers go further in explaining what to load and where.