This Powerbook originally came with OS 9.2.2 - which means it can't use earlier versions of the OS. So 9.0.1 won't work on it - it doesn't have the necessary support files.
Your 9.2.2 disc appears to be an updater disc, yes? So it may or may not have all the necessary files even if you use TomeViewer to manually extract them.
In order to function, Classic Mac OS needs a System Folder with just a few files in it - System, Finder, Mac OS ROM, and the Fonts folder (along with the major System fonts). You could use the Fonts folder from 9.0.1, but everything else would need to be in 9.2.2. Your 9.2.2. might have them, or it might just have the chunks of them necessary to update the 9.2.1 versions of them.
Your only other option would be to install OS X Jaguar 10.2.3 or higher, which also supports this machine. (Some earlier ones shipped with 10.2.1, but since there's no real way of knowing if you have one of those, you should consider 10.2.3 the minimum.)
Your cheapest and simplest method might be to buy a used set of 10.3 Panther CDs. You can get them on the LEM Swap list sometimes, for $20 to $30 shipped. In addition, IIRC because 10.2 and 10.3 installer CDs will install the Classic Environment, it's also possible to use them to install OS 9.2.2 directly, which might be another way to achieve what you're trying to do.
Your 9.2.2 disc appears to be an updater disc, yes? So it may or may not have all the necessary files even if you use TomeViewer to manually extract them.
In order to function, Classic Mac OS needs a System Folder with just a few files in it - System, Finder, Mac OS ROM, and the Fonts folder (along with the major System fonts). You could use the Fonts folder from 9.0.1, but everything else would need to be in 9.2.2. Your 9.2.2. might have them, or it might just have the chunks of them necessary to update the 9.2.1 versions of them.
Your only other option would be to install OS X Jaguar 10.2.3 or higher, which also supports this machine. (Some earlier ones shipped with 10.2.1, but since there's no real way of knowing if you have one of those, you should consider 10.2.3 the minimum.)
Your cheapest and simplest method might be to buy a used set of 10.3 Panther CDs. You can get them on the LEM Swap list sometimes, for $20 to $30 shipped. In addition, IIRC because 10.2 and 10.3 installer CDs will install the Classic Environment, it's also possible to use them to install OS 9.2.2 directly, which might be another way to achieve what you're trying to do.