Yikes 266MHz FSB and SDRAM. Well I have a similar machine in my basement that I have personally discontinued, so I feel your problem. But in all honesty, it would be a much smarter choice to upgrade to a newer platform (AM2+ or AM3), because it seems that old parts never actually get too cheap. For example the Nvidia GeForce 6200 video card is about 5 years old and still costs about $50. A new Nvidia Geforce 9500GT can cost as little as $60 and outperform the 6200 by miles, and then coming back to beat it up.
I do not know your financial situation, but you may want to try building a new machine or atleast picking up a cheap new PC. This Compaq (HP's value line) is only $270 and will absolutely destroy your setup (no offense):
The O.P. could perhaps find a sucker to buy that antique for perhaps $150 and if lucky maybe $200.It's possible because there are suckers born every minute.
I sold a 486 based system in the year 2000 for an incredibly high price of $250.
The buyer was happy.
I wonder how much I could get for my antique 2 original working Macintosh's serial # 2336 and 5132 (I didn't buy them new only a sucker would do that rather I restored them to operational condition).Perhaps I could trade one of them for a NEW $2,500 Mac Pro tower to a Mac user desperately desiring an original pre 6000 series Macintosh (the first ones ever sold in Apple's dealerships in January 1984).Yeah I'd trade a $10 thrift store junker for a new Dual Xeon Nehalem Mac Pro Tower.