I found this
http://forums.clubrsx.com/showthread.php?t=413831&highlight=diy+tranny+fluid
this diy is for a rsx but its the same concept for our cars
1. Raise the vehicle on a lift.
2. Drain the ATF.
3. Refill the A/T with Honda ATF-Z1.
4. Start the engine.
5. Press the brake pedal, move the shift lever to D4,
and release the brake pedal.
6. Press the accelerator pedal so the speedometer
reads 50 mph. Make sure the A/T shifts through the
first three lower gears and into 4th gear and the
torque converter locks up. Release the accelerator
pedal.
7. Press the brake pedal to stop the front wheels.
8. Move the shift lever to R, and then to N. Release
the brake pedal.
9. Repeat the shifting procedure (steps 5 through 8)
four more times.
10. Turn off the engine.
11. Drain the ATF.
12. Repeat steps 3 through 11 two more times.
13. Reinstall the drain plug with a new sealing washer.
14. Refill the A/T with Honda ATF-Z1.
This process involves 12 quarts of transmission fluid which would cost somewhere between $60-70. Add about an hour's labor charge (it's $75/hour at my dealer) and the total cost is around $140 - not bad considering the fluid has never been changed in your car. I expect you'll notice a significant improvement in the performance of your transmission.
Going forward, I would do the drain/fill (the 3 qt process) every 30k miles at the very least. I've chosen to do this every 15k.
thanks to v6p.net