I did something quite simalar myself over winter break, hadn't gotten around to posting the pictures of it, appologies for my low quality photography skills.
I have a Geforce3 [straight] and it came stock with this little beast of a fan:
60mm of pure pain, instantly qualified as the loudest component in my computer. I especially love the small text on the fan that says low noise
So, I was thinking about getting a new CPU heatsink anyway, and decided on the SK-7, which left me with a spare FOP32 to dispose of:
So I took my trusty hacksaw too it, removing the fins along one edge enalbing it to fit into the AGP slot without contact:
After lapping, applying Thermal Adhesive, and sealing time, the mod was ready to put into my case:
While nothing impressive, its my first non-trivial mod, and I'm happy enough with it. The plate is hot to the touch, but I've yet to have any stability problems with it, and may install a BR-123 fan bracket w/ fan to play it safe. Let me know what you think.