when the first chipped canon's came out years ago, people generally believed they would be able to bypass or hack the chips within a few months. apparently canon implemented such a strong encryption on the printers that to this day its still not possible to use generic chips. i actually bought a chipped canon printer when i could have got a non-chip one just because i was sure it wouldnt be long before they get around the security chips. its been over 2 years now... best thing to do is spend the $200 and get a ip4000 off ebay. youll save it all back in no time.