I got into this same thing about 2 months ago.
I found out that I could delete it from inside Nero's CD/DVD compilation screen.
It's accessable from the File Browser window. Just click & delete it.
e6400 Core 2 Duo @ 2.13ghz
GeForce 7600GT 256mb PCI-e
2gb DDR2 667mhz Patriot ram 1.8v in d/c
Gigabyte GA-965P-DS3 F10 BIOS
WD Caviar SE16 250GB SATA300 7200RPM 16MB Buffer
Samsung SATA2 80gb 7200rpm
Samsung SH-S182D 18x DVD burner