Tell the *boss* that it doesn't make good economic sense to upgrade your current mobo.
For $200.00 you can buy a AMD 1GHZ, mobo, 128mb DDR, and GF2 MX-400 64 mb card from Pricewatch.
This will give you future upgrade capacity, your Celeron system is at a dead end.
I did an upgrade similar to what your contemplating about 6 months ago and bought a GF2 MX400 64mb, a slotket and Celeron II 600 and overclocked it to 933mhz.
A Celeron II 1.1GHZ and GF2 MX400 is $115.00 on Pricewatch.
While a big improvement over the 466 I was running it wasn't enough horsepower for some applications.
I bought an AMD 1 GHZ, ECS K7S5A, and 256mb DDR last month and it blows the previous setup away, it doubled my system score in some benchmarks and gave a big increase in 3DMark2001 score.
Mason is correct about the GF2 MX 400, it won't be a limiting factor for a system under 1GHZ, mine is adequate for all the games and applications I run.
[ 12-05-2001: Message edited by: weazel ]