Hopefully someone won't mind helping me out 8)

Trying grub-dfe.iso to boot retail Leopard DVD and I get the following error/output:
Booting ‘OSX DVD Loader’
Root (cd)
Filesystem type is iso9660, using whole disk
Kernal /boot/boot
Error 15: File not found
Press any key to continue…
Basically I've just burned the grub-dfe.iso to a CD, booted off of it, swapped it out for my retail DVD and hit enter to boot with the default settings. Looks like it sees my DVD, but it doesn't have the right boot arguments. What do I need to do to get past this point, or am I using the wrong approach or bootloader CD? Any help is appreciated. Trying to go as legal as possible, so I don't want to use a disc like Kallyway. Thanks!

My system specs are:

  • Motherboard: Biostar GF7100P-M7S
  • CPU: Intel Pentium D 945 Dual-Core 3.40 GHz 2x2MB L2 Cache
  • Chipset: GeForce 7100/nForce 630i
  • Memory: 2 GB DDR2 800 Mhz
  • On-board LAN: Realtek 8111b 10/100/1000
  • On-board Audio: ALC662 5.1
  • PCI-X Video: Gigabyte NVIDIA GeForce 7300 GS
  • /dev/scd0: Samsung TSSTcorp SH-S182M CD/DVD DL Optical Drive IDE
  • /dev/sda: Seagate Barracuda 7200.9 120 Gb IDE, O/S Ubuntu 8.04
  • /dev/sdb: Seagate Barracuda 7200.10 250 Gb SATA II, O/S (hopefully OS X 10.5)
  • /dev/sdc: Seagate Barracuda 7200.10 250 Gb SATA II, ext3 formatted for misc data