CD/DVD rom Generator 1.50 image question

[gamesmell]

Ive used it before to install a swap magic patch on Alter Echo and it worked fine

last time I changed the first file to an .iso and the next ones to SONETHING LIKE iso.000 .iso.001 and so on and then recorded it and it worked perfectley full game was copyed

have not tryed to copy anouther one yet

heres my problem I cant remember if that was what I changed the files or not I know I changed the first one to iso but after that
im not completley shure what I changed the files to after the first one its been to long im pretty shure it was .iso.000 Im looking for conformation