Unable to install Windows 2000 Server on dual CPU 7DPXDW+

Having problems installing Windows 2000 Server in a new system built as
follows:

Gigabyte GA-7DPXDW+ motherboard
Two Athlon MP2800+ boxed (i.e. using their own heatsink)
Yamaha CD-RW (can find out model if important)
13GB ATA-100 HDD (ditto with model)
4 x 512MB DDR PC2100 266MHz 184pin (2GB total)
Antec True Power PSU (lots of power)
13GB HDD & CD-RW connected to IDE-3 as master & slave (will be using IDE-1
for RAID later)

Problems:

1) Motherboard didn't recognise MP2800+ so W2K thought on one CPU. Upgraded
BIOS to F5 which resolved this

2) System sometimes hangs during the POST after using ALT-CTRL-DEL (soft)
reboot. Hard reset solves it but not nice!

3) After reboot the registry becomes corrupt - suspect big IDE cache bug in
W2K so trying W2K+SP4

4) W2K Server install progresses fine until detecting hardware when
following errors are generated:

a) Windows could not load the install for CDROM. Contact your hard vendor
for assistance
b) Connot load MPU401. The driver file may be missing. Try installing the
driver again or contact your system administrator
c) Windows count not load the installer for Battery. Contact your vendor for
assistance

After Windows 2000 server boots up, tries to install Yamaha CD driver (which
has never needed a driver!) and also has failed to install Windows network
client. Manually attempting to install Windows client fails with error about
unable to find the file. There are also many unresolved entries in the
device manager which don't install cleanly...

Bit of a dogs dinner really...

Any ideas anyone? Wondered about RAM but thought it unlikely it would fall
at the same place everytime (have tried install 5 or 6 times so far).
Suspected CD so swapped that with no effect.

Cheers, Rob.