I had the same problem burning an iso image for a patched kernel version of linux *iso file. You don't need to use Nero - you should have a prog called cdrecord.. do a 'which cdrecord'.
you'll need to do a 'cdrecord -scanbus' to find out what the dev ID's are (dev=0,0,0). You'll see something like the following...
0,0,0 0) 'TOSHIBA ' 'DVD-ROM SD-M1202' '1020' Removable CD-ROM
0,2,0 2) *
0,3,0 3) *
0,4,0 4) *
0,5,0 5) *
0,6,0 6) *
0,7,0 7) *
We're only concerned with the first 3 numbers in the TOSHIBA line. Put this in the command line below, where dev=
type in 'cdrecord -v speed=2 dev=0,0,0 -data /blah/blah/whatever.iso'
BTW, don't forget the -data flag. I forgot it and burned the "file" not the "image" onto 3 CD's. I believe the data flag tells it to burn bit-for-bit. I can't remember, but you might have to tell it the filesystem type iso9660 - don't quote me on that! Good luck.