MBR failure

[JoesMorgue]

I have installed iPC off the iPC Live 10.5.6.
I have tried to fix my MBR about 5 times without success.
It werks, but only after I boot off the DVD and type rd=disk1s1.
I just added OS X to my Vista boot manager, but that just locks up the system.

What do I do?

[Aydinz]

we need more info! what is the procedure you used to install iPC what error do you get?

[JoesMorgue]

I used iPC Live, ver 10.5.6 which has a GUI install.

The command I use to fix it is:
fdisk -e /dev/rdisk1 (I'm wondering if this is where the problem is)
update
f 1
w
q

When I booted to fix it, its off the DVD, the BIOS has it as rdisk1, but if I go to BIOS and select it to boot, woudn't it become rdisk0?