I have installed my Canon LBP2900 I-SENSYS on my girlfriends Windows laptop, and shared the printer. I have previously https://firmit.wordpress.com/2008/04/10/canon-lbp2900-setup/ showed howto setup the printer via USB.
What you need is the ppd-file – which is available at Canon’s official site:
Download and extract, and install the two debian packages with
$ sudo dpkg -i cndrvcups-common_1.60-1_i386.deb cndrvcups-capt_1.60-1_i386.deb
Now, install printer via samba in cups or via your DE – Gnome has a GUI way of doing this, but cups works like a charm.
Add new printer -> Device: Windows printer via Samba
Device URI: smb://administrator/192.168.2.1/canon
This of course points to the Canon LBP2900 with shared name “canon” on email@example.com with no password. Worked from the word GO!