I installed vista and iatkos 2.0 dualboot. I use chain0 method and i get still waiting for root device error. My pc: gigabayte p35-ds3r, intel e6600, vga point of view 8800GTS extream, ram 4x1gb crucial ballistix 800mhz, hdd 1 x seagate 320gb,sataII, 1 x samsung 500gb, sata II and 1 x samsung 320gb, sata II.
Before installation i selected : iatkos v2.0 Main System, Darwin Bootloader, Remove Thermal Kexts, Intel SATA.
Any solutions ?

Try Leo4All v3. Format your entire HDD.

Goodluck,

you need to use at boot:
rd=diskX
in which X is 0 to 10 (you need to find which boots).
Something like this:
rd=disk1

That instructs the OS to boot from disk 1.

Good luck.