I think you might have more problems upgrading to a 1.2GHz Celeron if your motherboard is that old. Check with the manufacturer to make sure the chip is compatible before you spend money like that.
As for the video card... SiS, Trident, and ATI have some decent low-end graphics cards that run at AGP2X. Also, most AGP4X cards are backwards compatible with 2X slots, so even if you buy a 4X card it will probably still work. You just won't get full performance out of it.
Hope this helps.
w00t! Post number 400, I am now and Addict!!!!
<font color=red>"I'm not gonna launch a $2 million missile at a $10 tent and hit a camel's butt." -Bush</font color=red>