Boot problems with Asus A8N SLI Deluxe

[kyrtid]

I have problems with installing Leopard Zephiroth 10.5.2 rev1 for AMD and would appreciate any suggestions on how to continue. I have reviewed a lot of other threads but nothing has helped.
My hardware:
Asus A8N SLI Deluxe
AMD Athlon 64 3200+
1GB RAM
2 SATA HDDs
1 ATA DVD
1 ATA CD-RW
M-Audio Audiophile 2496 sound card (I suppose it won't work but it's in the computer anyway, maybe I should remove it?)

I install including setting up my disks as:
2 partitions on each of my 2 SATA disks.
All partitions using Journaled HFS+
GUID boot
Installation is on rdisk0s2
Customizes with no SSE2/3 kernel, drivers for sound and Nvidia graphics etc
After install I reboot with the DVD still in the drive. (should I?)
I get a gray screen where it hangs.
I reboot again, press f8 and '-s'
Now I try (found in other threads):

cd /usr/standalone/i386
dd if=./guid/boot1h of=/dev/rdisk0s2 bs=512 count=1
(OK)
dd if=./guid/boot0 of=/dev/disk0 bs=400 count=1
(OK)
/startupfiletool /dev/disk0s2 ./boot_v8
(error saying something about unable to unmount cleanly)

I also tried booting without the DVD but then the computer will not boot at all so I suppose the Leopard installation is not active yet.

I also tried the permission repair routine but it fails because I can't find the sudo command. I seems not to be in the search path.