A 1400 should take 9.1 by default. If the installer is not working you might need to check what the localization is, etc.
You might do a bit of googling about this if you want 9.2.2:
http://eshop.macsales.com/OSXCenter/OS9Helper/Framework.cfm?topic=32
*Edit
Oh, looks like it might be a bit more work
http://web.archive.org/web/20120204045426/http://www.os9forever.com/Compatibility.html
You might do a bit of googling about this if you want 9.2.2:
http://eshop.macsales.com/OSXCenter/OS9Helper/Framework.cfm?topic=32
*Edit
Oh, looks like it might be a bit more work
http://web.archive.org/web/20120204045426/http://www.os9forever.com/Compatibility.html
So basically, if you want OS 9, just get 9.1 installed and leave it at that.