HT1661 Install OS byTarget Disc to iMac A1145

Question

I replaced the hard drive on this iMac A1145, which is a PPC and accepts an OS between 10.4.2 and !0.5.8.  Not having the Leopard disc, I am trying to boot to this machine via Target Disc Mode from my PowerMac G4 running OS 10.4.11.  Once connected, I hoped to install the Tiger OS on the new drive.
I was able to get into Taget Disc Mode just once, but I thought I needed Carbon Copy Cloner, so I shut it down.  On attempting TDM again, I have been unsuccessful.  I get TDM on the host machine, but the target only displays the flashing folder alternating the Mac face and the question mark. 
Are there other TDM methods to try?  I have followed the Apple Kbase advice to first startup the target, connect the FW cable and then boot the host.  When I reverse the order by using the iMac as the host to appear on the G4 PowerMac, I get the yellow symbol moving on the blue screen, but the HD icon doesn't show up on the G4.  My alternative is to look for a Leopard install disc to try, but not having one, I would like to avoid spending $20 or so if it turns out to be a hardware problem. Again, the iMac responded beautifully the first time...but not later. 
Advice appreciated,with thanks.

Answer 1

OK. That's because the iMac has a blank disk. Let's try again:
Boot the iMac into TDM. Boot the G4 normally. On the G4 open Disk Utility. Look in the list to see if you find a disk drive listed that corresponds to the one in the iMac. The main entry for the drive will have the model identifier and drive size. There will be no sub-entry, or volume.
Select the drive's main entry then click on the Partition tab in Disk Utility's main window. In the Partition Scheme dropdown menu selet one partition. Set the Format Type to Mac OS Extended, Journaled. Click on the Options button and select Apple Partition Map (APM) then click on the OK button. Now click on the Apply button.
After the above you may now clone your G4's system to the iMac (I assume that's what you want to do):
Clone using Restore Option of Disk Utility
  1. Open Disk Utility in the Utilities folder.
  2. Select the destination volume from the left side list.
  3. Click on the Restore tab in the DU main window.
  4. Select the destination volume from the left side list and drag
       it to the Destination entry field.
  5. Select the source volume from the left side list and drag it to
      the Source entry field.
  6. Double-check you got it right, then click on the Restore button.
Destination means the iMac volume. Source means the G4 startup volume.