I spent 2 months trying to find out locally and on the web how to install my radio code for my 2004 Suzuki Ignis GLS VVT 4Grip. [ I took the battery off to charge it and it came up CODE. It drove me crazy. Then I rang Pebble Beach Suzuki Dealers at Cirencester Glos and a very kind chap rang me back later with Installation instructions. So I'll share this with you. It might work for your Ignis...
Press 'Band' button in until it bleeps. A space pops up for code insertion. Press button no 1 on panel until your first code number appears in the first space(change right or left arrows on dial to change no's) and repeat using no 2, no 3, and no 4 buttons for succesive code no's. Then press 'band' button again and hold in until it bleeps. The radio/cd should then come to life.
Tony Carpenter
December 2009