Please help with wireless printing

Question

I am running a wireless network in the house and having trouble printing. The printer (Canon MP800) is connected via USB to my Windows XP desktop. The desktop is connected via Ethernet to a 2Wire DSL modem that broadcasts the wireless signal to my Powerbook G4 running OSX (10.4.10). I can’t get the powerbook to print, though.
I have followed the instructions at http://www.ifelix.co.uk/tech/3015.html up to the point where it says:
“Select the printer but do not click Add as you need to change the Printer Model.”
“Under Printer Model select HP.”
I assume that since I am using a Canon that I should look for Canon instead of HP. The only options I get are
Generic
Other
Apple
ESP
“Generic” is a selection all by itself
“Other” opens up a finder dialog box that allows me to choose a file on my harddrive, but I have no idea where to go.
“Apple” opens a pulldown menu that allows me to select from a list of Apple printers.
“ESP” opens a pulldown menu that allows me to select from a list of other printers. This list includes Epson, HP, etc. but does not include any Canon printers.
I selected the “Generic” option. When I try to print from the powerbook, I have noticed that the printer queue on my Windows XP desktop shows a document entitled “Remote Downlevel Document.” The printer queue spools up with this document, it appears to go through the cycle and then disappear (as a normal print document does), but nothing happens on the printer.
The desktop will print normally. The powerbook will print normally when I connect the printer to it via the USB cable but another printer is created in the Printer List. This printer is named MP800 and is kind: Canon MP800 whereas the first attempt (wirelessly) names it Canon MP8 and is kind: Generic Postscript Printer.
In troubleshooting I have attempted to remove and reload the printer from both the powerbook and the desktop independently to no avail. I have even temporarily removed the firewall (Norton 360) from the desktop to make sure that wasn’t it.
I Googled the term “Remote Downlevel Document” and discovered that it was associated with a virus that affects print servers. I updated my Norton anti-virus and did a full system scan which came up clean. Some of the Google results also suggested that there might be clutter in one of the printer folders in Windows. I should remove any .tmp files I find there, but when I followed the path, there were no such files in that folder.
I apologize for the length but I wanted to make sure I had a full and accurate account in case someone might be able to point me in the next appropriate direction. Thanks for whatever advice you can offer.
I am cross posting this question on the macbookpro yahoo group, the applemac yahoo group and the apple discussion page.

Answer 1

still looking for some help on this intriguing matter... if anyone can help out, i'd really appreciate it! thanks.
edited original post:
I have a Samsung ML-1710 printer which we use with both an iMac and an iBook. When the iMac needs the printer, we connect the printer's USB cable to the iMac. When the iBook needs the printer, we connect the printer's USB cable to the Airport Extreme Base Station (AEBS).
Both the computers use the AEBS - the iMac is connected via ethernet (DSL modem) and the iBook connects to the AEBS wireless network.
The small annoyance of having to change the USB cable aside, there is a bigger problem. After every time the printer is used by the iMac, printing does not go through on the iBook. The only solution I've found is to restart the AEBS (through AirPort Admin Utility). As this interrupts the wireless network, it is a major annoyance.
I do not want to spend $ on an Airport card for the iMac at this point...
Is there any way to correct this? Thanks in advance for your help.