Missing The printer is missing from the Chooser in OS9 Classic running in OSX 10.3.9. Works fine in OSX.

Unfortunately the software will not work with OSX. OS9 (also refered to as classic os) had some compatibility with macs up to 2005 when Apple changed the processors in macs to Intel. Since then all OS9 software no longer works.
There is a small chance you may be able to browse/search the CD's folders for images as the photo objects may be in jpg/gif/png format. Try opening finder, select the CD. and search with the text box in the upper right corner in Finder.

G5 will not boot off of OS9. Since you are more of a pc guy, think of it like this, you buy a used newer pc meant to run Vista, and you are trying to load Windows 98 on there. You can run any of the OSX flavors on there...
Depending on your Model (scroll to bottom) of G5 you need to be running...
2003 -> at least 10.2 Jaguar 2004 -> at least 10.3 Panther 2005 -> at least 10.4 Tiger
10.5 Leopard is Apple's newest operating system and it can be run on any of these models. You need to buy a retail copy (has drivers for every model) unless you buy exactly the right system disk for that specific model.
OS9 can be installed and run inside of OSX using something called Classic mode. This would be like running a virtual XP Pro inside of Vista.

Canon only has this scanner driver in OS9 and it will run in classic mode if you are using OSX. This $40 software will work with your scanner in OSX, but for $40 you can purchase an OSX native scanner too.
http://www.hamrick.com/index.html

try The manufacturer's website.

if you have a power pc you could get an os9 version and run through classic

may be some conflict in os and hardware,
repare the OS using cds
or select restore option

hello sir

Apple's troubleshooting guide for OS9 can be found here:
http://docs.info.apple.com/article.html?artnum=106912

Eurpoe has OS and OSX drivers and software
http://software.canon-europe.com/products/0010526.asp

Australia has some OSX drivers and software but does not specify version
http://www.canon.com.au/products/all_in_one_printers/all_in_one_printers/mp470_support.aspx

OSX support for Powerbooks is VERY sloppy. Try installing the iP90 in "Classic" (OS9.2.2) instead. 922 has built-in drivers for every port on Powerbooks. OSX can't even load a SCSI card on laptops. Or iRda, or any USB above 1.1 etc.... very shabby. Apple was sued for "abandoning" Powerbook support with OSX and LOST a BIG class action. Alternatively, partition your HD with TWO operating systems, and load 9.2.2 as a boot option (with OSX as the other). OSX is "emulating" 922, but this method allows OS922 to "run itself". It is MUCH faster (boots in 10 seconds, compared to MINUTES for OSX) and your iP90 will work on USB or irDa -both! 922 will only need a 700mb partition at least... OSX needs 4gb or more (to accomplish far less, far slower)