Hi, I own a Gateway PC with the following specs:
Processor Type Intel Core 2 Quad 8200
Processor Speed 2.33GHz
RAM 8GB DDR3 SDRAM
Hard Drive Speed/Capacity 1TB SATA
Optical Drives 18x DVD+/-R/RW SuperMulti Drive
Graphics ATI Radeon HD4650
Pre-loaded Operating System Windows Vista Home Premium 64-Bit

I am able to boot iATKOS with cpus=1 but when ever it installs right before it finishes it fails and goes to a bunch of coding and asks me to take a picture of it (Sorry for not knowing what this is called). I have tried many combinations of "customize" before installing. Can anyone help me?

Okay I think is was able to install it but now during boot it gives me this error:
boot0 mbr
boot1 done
boot2 error

Help?

UPDATE***

Now when I boot from the hard drive it flashes an underscore: _

Can anyone help me?

How did you customize your installation?

I customized it with

Xiestyl (something like that) installer
AppleDecrypt
SMBIOS-EFI
Disabler
OHR
RemoveTy
Voodoo PS/2
ATI VGA driver
INTEL SATA
Intel Pro/100 wired network

What i just did was go into terminal and put in:
diskutil list (to know your partition number)
fdisk -e /dev/rdisk0
flag 2 (put your partition number of leopard)
update
write
y
q

This gave me:
Boot0: MBR
Boot0: done

I can successfully load Leopard by pressing F8 when CD is booting and typing "cpus=1 rd=disk0s3"

So what can I do to fix the boot manager and access my Vista OS?

THANKS ICCHANSAN!

@.o; Kkz something is wrong there but anyway to boot into vista, boot into your vista DVD and repair your bootloader, it will take like a min then you'll be able to boot into Windows

Theres guides for this, check our guides for Leopard/Vista in the dual boot section

hmmm when I try to boot a recovery disk it gives me:
boot0: MBR
boot0: error

Another freakin update.

I was able to get into Vista and instal EasyBCD and set it up. When I turn on my computer and EasyBCD kicks in I am able to select Vista or LEopard. When I select Leopard I get a flashing _ (underscore).

Hopefully this wil be able to be resolved shortly with this last problem

Hmm oh iAtkos v7, you need to check uphucks site to know how to dual boot, maybe the guide for iatkos v7 / windows 7 will help you, but I know in uphucks site theres guides for this or you can check chameleon forum too to know how to dual boot. I dont dual boot, so I dont have much experience with this sowwy, lets pray for someone else to help you here.

try asking here too, dont pm anybody: irc.osx86.hu #hackint0sh, report back your progress