Duplicator/Burning Software

The multimedia company i work for bought a CD duplicator about 8 years ago. It had 8 scsi CD Rom burners using 4 scsi controller cards. My boss asked me to revamp the duplicator to burn DVD’s as well as CD’s.

Basically i changed out the whole system including the motherboard and installed 8 LG DVD Burners (SATA) and 3 SATA controllers.

System recognises all of the ROM’s i installed NERO 7 but i can only burn a maximum of 4 Disks at one time.

Can anyone please suggest to me some decent software that will allow me to burn to all 8 drives.

Thank you in advance