Start with the printer OFF
1. Hold down RESUME and then hold down POWER
2. release RESUME
3. press RESUME twice, then release POWER
4. Let green light blink until printer is done futzing Select function with RESUME press POWER to execute: presses - light color - function

Number of presses - light color - function
0 presses - green - Test print (or exit service mode on i960)
1 press - orange - EEPROM info print (plus grid nozzle diagnostic on i960)
2 presses - green - EEPROM initialize
3 presses - orange - Reset waste ink counter

Waste Ink Counter Reset Manual for Service modeStep 1:
1. Turn off the printer. And disconnect the printer cable.
2. Press and hold the POWER button, turn on the printer.
3. The indicator (L.E.D.) should be green.
4. Press and release the RESUME button , the indicator (L.E.D.) should be orange.
5. Press and release the RESUME button again, the indicator (L.E.D.) should be green.
6. Release both buttons.

Step 2 :
Software for Permanant (1st method)
1. Reconnect the USB cable and turn ON your Printer
2. Open "General Tools for iP1000"

Sofware Download: http://rapidshare.com/files/27790261/iP1000_Service_Tool.rar
3. Select (USB PORT)
4. Choose (SET DESTINATION 1)

Reset Ink Counter/Level Canon iP1600

1. Turn off printer
2. Hold down Resume button and press Power button.
3. Keep holding down Power button and let Resume button go.
4. Press Resume button 2 times then let BOTH buttons go.
5. Green lights will flash and then stop blinking.
6. When green lights are solid, press the Resume button 4 times.
7. Press the Power button and the printer should turn off, if not,
press the Power button once more.
8. Your printer should respond as normal.

This is the most downloads for reseters ( according to my downloads count )
Just download at this link : Reset Canon iP1200,1600,2200 : http://rapidshare.com/files/27422186/ip1600st.zip