This might nor work for Ubuntu 7.04 or later
First install this Install libxml via synaptic 
1 .Download
Download Ip1000 pixma driver here
2.Unzip
Unzip files in disired location
4. Install
$ sudo dpkg -i <.deb packages>
example: /home/joey/GyacHE.deb
5.Edit .ppd file
To allow printing quality options to be accessed through cups’ printer properties you must edit as root the printer’s ppd file.(This applies only to the ip1000.
$ sudo gedit /usr/share/cups/model/canonpixmaip1000.ppd
Add these lines:
*OpenUI *CNQuality/Quality: PickOne
*DefaultCNQuality: 3
*CNQuality 2/High: “2″
*CNQuality 3/Normal: “3″
*CNQuality 4/Standard: “4″
*CNQuality 5/Economy: “5″
*CloseUI: *CNQuality
You can also replace these lines:
*OpenUI *Resolution/Output Resolution: PickOne
*DefaultResolution: 600
*Resolution 600/600 dpi: “<>setpagedevice”
*CloseUI: *Resolution
with:
*OpenUI *Resolution/Output Resolution: PickOne
*DefaultResolution: 600
*Resolution 600/600 dpi: “<>setpagedevice”
*Resolution 1200/1200 dpi: “<>setpagedevice”
*Resolution 2400/2400 dpi: “<>setpagedevice”
*CloseUI: *Resolution
Save the file
6. Fix libs
$sudo ln -s /usr/lib/libpng12.so.0 /usr/lib/libpng.so.2
$sudo ln -s /usr/lib/libtiff.so.4 /usr/lib/libtiff.so.3
$sudo ln -s /usr/lib/libxml2.so.2 /usr/lib/libxml.so.1
(i don’t know why i do this but otherwise the printer does not work)
7. Restart Cups
$ sudo killall cupsd
$ sudo cupsd
8. Setup Printer
-System>Administration>Printing>New Printer
-Choose Local or network printer and specify port or url, respectively
-Forward
Manufacturer>canon
Model> PIXMA IP1000 (depends on your printer)
Driver>Standard
-Apply
(if you can’t find your printer choose:install driver>choose the ppd file you edited, reboot and try again to setup printer)
9. Test
Right Click on printer> properties>print test page
10. Setup on GIMP
-open an image to print
-file>print>Choose your printer name>setup printer:
Printer Model>PostScript level 2
command>lpr -P (PIXMA IP1000)
PPD File>browse at /usr/share/cups/model/ (mine is /usr/share/cups/model/canonpixmaip1000.ppd)
-OK
-Save Settings
-Print
