Imaging a PowerPC with an Intel-Based Mac
Creating the Image
Setup the your PowerPC as you like it with all the software, updates, preferences, and user accounts that you like. Once you have your PowerPC all ready to image, restart the computer. Before the computer chimes with the Mac start up sound, hold down the 't' key to boot the computer into Target Disk Mode. This mode will allow you to access file and architecture specific things while the operating system isn't running. Connect the PowerPC with a FireWire cable to the Intel-Based Mac. Once connected, usually time machine pops up with a dialog box asking if you want to use that drive for backups. Always close those windows when they pop up, they are not the type of backup that is needed in this case.
On the Intel-Based Mac, open the application called "Disk Utility". You can find it two ways 1) by spot light search, pressing the command+space will open it by default, and 2) by navigating to Applications->Utilities->Disk Utility. Disk Utility displays all mounted disk to the running computer. Therefore, you should see the hard disk from the computer you are running, the PowerPC that you are trying to image, and any other disk that might be attached like flash drivers, or external drives.
Click on the FireWire Target Media drive. Once that drive is highlighted, click the icon that says "New Image" at the top. A dialog box will appear and ask you were to save it, the file name, compression type, and encryption. In this situation, set compressing type to read-only and encryption to none, then save.
Once the image is created, we can start imaging other computers with that image. Unmount the computer that is in Target Disk Mode when you are finished.
Resorting the Image
To resorting an already made image (dmg file) to another PowerPC from our Intel-Based Mac. Connect the computer through Target Disk Mode, as before by holding down 't', and connect it to your Intel-Based Mac, then open Disk Utility on the Intel-Based Mac. First we have to erase what is on the computer to start clean. To do this, click on the FireWire Target Media and navigate to the "Partition" tab. Under Volume Scheme: 1 Partition and Name: Macintosh HD, then under options make sure that the partition scheme is Apple Partition Map, since only this will allow the computer to boot correctly (It will not work any other way). Then click "Apply".
Once partitioned, navigate to the Restore tab. Drag and drop the dmg image you made earlier, or click Image to locate it, to the source box. The destination will be the newly partitioned drive, this also can be drag and dropped. Check the box "Erase Destination" and click Restore. The process ranges on time depending on how large the image is.
After the restore is complete, unmount the drive, then restart the computer. The computer will be exactly like the image that was made.