Psx Backup On Mac Don't?????????

[alx002]

I want to back up my game Tomb raider THE LAST REVELATION

on my mac g4 400

I'have CD COPY 2.03

I save the track with cd copy on my hard drive

I have toast 4.1

I put the track in toast

Toast select image disk mode but a new window appear with the following data: pregap; postgap; and I have to choose the sector size???????

I don't anderstand what it is and when after I burn the CD it never works

what is the probleme..........?,,,,,,?????
I made all what is discrib in all PSX BACKUP GAME FORUM
Thanks to help me!!!!!!!!!!!!!!!!!!!!!!!!!!!!!