How to Boot w Darwin on Startup eeePC1201T

Ive finished installing Kalyway 10.5.2 for the 4th time and got this same problem.
When Startup Mac X it always stuck at the "Welcome" screen > choose language > choose keyboard layout > choose Migration later >>> and after a minute the "Welcome screen re-appear.
Somebody told me to log in Darwin:
boot with -s flag

at the prompt type:

mount -uw / <Enter>

passwd root <Enter>

type a password <Enter>

retype the password <Enter>

touch /var/db/ .AppleSetupDone <Enter>

reboot <Enter>

log as root with the password typed.

Ive tried this many times but always stuck at "passwd root" > the reply: "command not found".
Then I found out I must rebooting not from the DVD ( -root# instead of -sh#)
But how can I do this, every time I boot from HD it open with Startup option: Window 7 or Mac. After I choose Mac then it straight goes to Chameleon w/o any options to enter to Darwin.
, I have no idea what to do.

Kris

The Spec:
Running Dual Boot Windows 7Ultimate and Kalyways Mac 10.5.2 on
Asus eeePC 1201T
CPU: AMD MV40
Chipset: RS780M
VGA: Mobility Radeon HD3200
RAM: 2GB