Disk not mounting in Target mode. Other options?

I had a disastrous snow leopard upgrade that has thrashed my hard drive on my MBP. It is strange because my iMac upgraded with no issues and is a more 'complicated' system to upgrade.
I get an invalid node error message when verifying the disk. I cannot boot the OS from the hard drive anymore. Attempting to do an OS install gives me an error message that the contents of the disk cannot be changed.
When I launch the OS from the snow leopard CD, I am able to get to the file system via a Terminal window. There are a few files that I would like to salvage if possible before doing a reinstall of the OS. I tried setting the MBP to Target mode to access from the iMac, but the drive does not mount (only the DVD drive mounts).
Are there any other options? I can also get to these files in single user mode. I would like to physically get them copied somewhere outside of the system if possible (instead of moving them to a different location on the drive and doing an install).
Any thoughts would be greatly appreciated.

Hi Andy Manson;
The invalid node error message indicates serious problems with the directory for that disk. This could be the reason that you are unable to boot.
You might try a demo copy of Data Rescue II to see what it salvage in the way of files from the disk.
Since AFAIK DiskWarrior is not ready for Snow Leopard yet that only leaves you a reformat of the drive to repair this problem.
Allan

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http://forums.mactalk.com.au/33/50669-lacie-1tb-big-disk-not-mounting-shared-dev ice.html
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Disk not mounting in Target mode. Other options?

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