You could burn from the command-line as well.
Check out 'mkisofs' and 'growisofs' - here's a small example (taken from dvdstyler, I hope it's correct...):
mkisofs -o myiso.iso -dvd-video "<DIRECTORY>"
growisofs -Z /dev/hdd myiso.iso
Also, nero now has a burner for Linux. It doesn't burn dvd-videos, I haven't really tried it.
And you don't need the SCSI-emulation AFAIK.