PowerMac G5 1.6Ghz not starting up... Help Please!

I've got a owerMac G5 1.6Ghz not starting up. I just came home and attempt to wake my computer from sleep. I just kept getting the spinning beach ball so I did a hard shut down. Now I cannot even get it started. I've disconnected all my external hardware and plugged the PowerMac directly to the wall as opposed to a power center and plugged my keyboard/mouse directly to the G5. The only thing I can manage to do is get to what I believe is called the "Single User" boot hitting command/s upon startup. I did a "fsck -fy" and I get a message somewhat as follows:
Invalid extent entry
keys out of order
rebuildign catalog b-tree
Invalid key length
Invalid node structure
--The Volume "drive name" could not be repaired.
I did a hard shut down. I tried to start up holding "X" upon startup since I have 2 internal hard-drives and I get the gray apple screen with a spinning dial going on forever just hanging.
I also tried using my system install disc (Leopard) and get the same results... gray apple screen with a spinning dial going on forever just hanging.
Seems to the only thing I can do is hold Command/S but I have no idea how to navigate to get this up and running again.
Anybody got any suggestions. I'm thinking one of the drives... say drive "A" is shot, but is there a way to boot from drive "B"? I do have my older system OS X Tiger on that one. Just cannot seem to boot from that or even get access to it.
Any help would be greatly appreciated. TIA

Dale Weisshaar wrote:
Are you using your Intel version of 10.5 to repair the G5's 10.5?
No, no, no... my Mac 20" Intel 2.24Ghz is fine. I wouldn't be using my Intel system disc to use Disk Utilities on my PPC G5 tower. I'm only focusing on the PPC G5 1.6Ghz right now. I have gotten the Tiger drive (B) up and running fine now. I did get the combo update 10.4.11 and re-installed the update. I used my stand-alone Leopard installer for running Disk Utilities on both drives. Both results say that "disk drive appears to be okay". However, I still cannot boot to the login screen through Leopard drive (A). Only Tiger at this time. So while I am running the Tiger drive, I can see all the files on the Leopard drive. Working on backing some of those files right now. I will be picking up the latest DiskWarrior. Last time I used DiskWarrior was version 2 when I had the beige G3 boxes and indeed, they do work great. And version 2 isn't exactly meant for OS X. I just never bothered getting the DiskWarrior upgrades since because I've never had any drive problems until now.
There is just one thing that bothers me about using DiskWarrior on Leopard. See this link:
http://www.macfixit.com/article.php?story=20071203100756482
However, as stated by Asloft, Alsoft recommends that you don't run DiskWarrior 4.0 while started from Mac OS X 10.5 Leopard. Instead, you should start up from the DiskWarrior CD. Which is what anybody should be doing when trying to fix any boot drive anyways.
So to cap this off, once I get what I need backed up from my Leopard drive, I will make another attempt to fix the directory on the Leopard drive. If that doesn't work, most likely I will try the "Archive & Install" option so I won't have to re-do all my personal settings and re-install my software over again. And if this doesn't work, worst case scenerio is to wipe and do a clean install on the Leopard drive.
Thanks for your input Dale, I really do appreciate all the fine folks that take some time to reading these discussion forums and helping out any way they can.
Cal

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