For use as Classic (under Mac OS X), it's not very picky about how the Mac OS 9 System Folder gets installed. You can just drag an existing 9.2.2 System Folder from another source and copy it to your PowerBook's hard drive volume, then set that System Folder as Classic in System Preferences.
With that in mind, it may be simpler for you to use another source for the 9.2.2 System Folder used as Classic. I posted a summary of that procedure in a different forum, so you can take a look here
(You should probably get an external FireWire drive and back up your current installation, so you don't lose your 10.3.9 "ET" system if you have a hard drive problem.)
Your OS X system files are in a folder titled System
If OS 9,x is installed, it is in a folder titled System Folder.
Many games designed for OS 9 (& below) don't work properly in classic mode. That's because the game software wants to control certain aspects of the Mac hardware, but it can't because OS X is in control.