Amd64 Installer

I posted this to the amd64 list, but thought it might be more 
appropriate here (at least question 1):

I recently tried using the 2005.1 installer on an Athlon 3200 Venice 
running on a GIGABYTE GA-K8N51PVMT-9, which has an Nvidia 430 chipset (I 
believe it is referred to as either C51 or MCP51 in the kernel).

I ran into two problems.

1) The boot process hangs on loading the sata_nv module. Using noload= 
allows the boot process to proceed. But I doubt I would have access to 
my HD

2) Sometime after init starts I get a Kernel Panic.

As a result I tried using the x86 2005.1 installer, which has worked fine.

My question is twofold:

1) How can I help in diagnosing the Kernel Panic? What information would 
be useful? My understanding is that this is a new chipset and at least 
kernel version 2.6.14 is needed (I'm running 2.6.15 under x86). What 
version does the installer use?

2) I guess by using x86 I am basically running my machine in 32-bit 
mode? Is there a way to transition to amd64, or will I have to 
reinstall? How much am I missing?

Thanks for your help, I've been a happy Gentoo user for a few years and 
this my first excursion into another architecture,

Spencer
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