ohhh, sorry my mistake.
It the first steps after the install disk reboot the pc.

are u sure the DVD it's right burned? cause i had a pc like that, and did the thing with a Kalyway DVD 10.5.1.
Can't remember now if the Kalyway disk has tohkernel
but you could try, hit F8, then type "tohkernel -v" if it boots, then go ahead.
if its not try XxX distro, there some post over here about it.
Also could try Retail/boot132 method.

do you get an error like this?
mine reboots itself when loading kalyway...tried loading iATKOS v1.0i..gets stuck on the apple loading screen

does the sequence goes like this:
http://www.youtube.com/watch?v=Ubanv-0o-3M

for the kalyway dvd?