This article covers the necessary steps for modifying the CX6600... Please read it through completely before attempting it though as it's not as simple as the R300 type printer(s).
A much clearer article (with images) is now available here:
Last edited by Martin on Sun Feb 22, 2009 6:03 pm; edited 2 times in total
Printers: (Canon) MP500/830, MX700, iP4000/4200/4300/4500/5200, iX4000(A3) (Epson) C84/86, D88, CX6600, R285/800/1900 (HP) K550, K850, K5400, L7680