Having a hair tearing attempt to upgrade to a dual
processor setup

I have an Asus P2L97-DS mobo, two PII MMX, 320 RAM, Intel
i440LX chipset, MPS 1.4 APIC compatible BIOS, 4 gig boot
drive with second 12 gig drive (both IDE), running NT4 WS
b1381 SP6a. After a BIOS upgrade I re-installed all
software from scratch, and now cannot get NT to recognise
there are 2 processors installed. Am getting multi-
processor kernel message in the loader blue-screen but
only one proccessor is profiled as present. Running NT
diagnostic returns only one processor profile, when
previously I had CPU 0 and CPU 1 details. Have exhausted
KnowBase solutions and tried every permutation of
installing, (ie installing NT with one PII then adding
second and either running UPTOMP.exe or updating by hand
or adjusting relevant setup.log checksums, or adding
numproc=2 entry to boot.ini) What am I missing here?

Any suggestions greatly appreciated, since I have enough
grey hair already and I'm rapidly losing my sense of
humour over this...
Cheers

Gil