I was in Staples today and found a BFG 7600GC-OC 512Mb AGP card on their 75% off table.I took it home for $39.00 Cdn.
I pulled out the old 6200OC 128 Mb card and replaced it with the new card. I booted up the computer and to my suprise the desktop loaded right away.
No adjustments were required. I ran glxgears and the frame rate was about five times faster. That was just too easy.