Ok, I think we're good, actually we are good, I've managed to finish this update and everything is working. So here's what I did to get past these instructions.
First things first, I would not recommend that you use these instructions here:
http://modmyi.com/wiki/index.php/How...iPhone_iUnlock
While they do work, they are not complete. Instead use the ones which were pointed to by SundayDuffer (thanks btw, this was a good place for finding the information necessary to unblock me). His link was:
http://iphone.unlock.no/
Ok, so onto the fix:
1. I had installed the bbupdater binary in the /bin directory but failed to chmod +x it. So once I did this I was able to perform this before continuing to Step 7. I would call this step 6.5 ;-)
2. Once the chmod +x was complete, I ran the bbupdater -v and got all the useful output. I then moved on and was still unable to save my DFL file but as I understand this is just a defaults setting file and only useful if you plan on running minicom in the future; so I skipped this.
3. After entering minicom I was then able to enter the commands as necessary and the rest of the steps worked as advertised.
4. Missing from the original install link which I provided was the LockDown file which I was able to get from the link SundayDuffer provided, I added this to the appropriate directory and then considered it finished.
5. I also did some checking and the com.apple.CommCenter.plist file does not need to be backed-up and reapplied. Found this out on a faith of god move where I rebooted and everything worked.
General Caveats with the process:
1. There was a mistyped command in step 10. the notes said:
/bin/launchctl load /System/Library/LaunchDaemons/com.apple.CommCenter.plist
What was missing here was the 'load -w', otherwise I was unable to load the CommCenter
2. This process is evolving fast. If someone by chance reads this I would recommend they wait the couple of hours likely needed and get a full graphical installer which avoids these potential issues. But if you've made it this far you couldn't wait :-)
Ok, that's all. Thanks again SundayDuffer, the link worked and my phone is now functional.
GhostBot