Question on BIOS settings

Dear All!

I recently built a low cost computer using:
Shuttle AK39N
AMD Duron 1,4 GHz
Kingmax 256 MB DDR RAM, 400 MHz
Seagate Barracuda 120 GB
and an old Leadtek Winfast s325 (TNT2, 32 MB, AGP 4x)

When installing Windows XP on this system it was a nightmare where files
could not be copied from CD, or when it installed, the register and
other files were corrupted on reboot. After disabling everything in
BIOS, I was finally able to get a working installation. Trying to narrow
the problem down by enabling one setting at a time, I've found one or
more of the following settings causing the problem:

PCI1 Master 0 WS Write
PCI2 Master 1 WS Write
PCI1 Post Write
PCI2 Post Write
VLink 8X Support
PCI Delay Transaction

I know some of the PCI settings has to do with the AGP bus. I also know
that the VLink setting itself causes this problem, but haven't tried if
also the other settings alone cause the same problem. Personally I
suspect the old AGP card might be the problem source, but I'm not sure.

Anyone who has any ideas?

Best regards
Magnus