SnowLeopard Will Will Not Update: continued part 2

Continued from SnowLeopard Quickview won't work:

My move to Mac over a year ago has not been exactly an easy one.  I enjoy the challenge of learning a new OS and actually prefer to use the Mac these days although I still use both.  I have had my problems though....
My first MacBook Pro had a hard drive crash and my Time Machine backup was also corrupted.  Lukily I received help and support from my Twitter PLN and our Board's Mac expert (Trini) who managed to save my Time Machine Backup and all the data contained.  The permissions were all mixed up.  The reason I mention this is I believe this has caused me problems even to this day.

I purchased a new Macbook Pro in June of last year and imported my account over from the old Mac.  This Migration tool was tool was incredible.  I was impressed when I was able to restore my computer from the Time Machine Backup but, this can easily be done on a PC too.  However, moving an account with all my exact setup, software, and data was incredible!  I am not aware of anything that does this so easily on the PC side.  The time savings was immense.  The MBP worked wonderfully until the OS x v10.6.2 Combo Update came out.  My MBP would download and begin installing the update but would fail to install it.  The error message suggested I contact Apple.  I combed through discussion forums and then I contacted Apple who I have found are very helpful.  Unfortunately they were unable to offer a solution that would solve this problem. 

Eventually I did get an idea from @mwalkinshaw to transfer my information over to another MBP and then send mine in to get checked out  (still have applecare).  I decided rather than send my MBP in I would transfer my information over to another MAC and then reinstalled OS 10 with all the latest updates to get it to 10.6.3 on my original MBP.  I used the Migration Assistant to bring over my account (and all software and data) to the original MBP and now everything seems to be working fine.

The best way to proceed would be to format my drive and install everything from scratch. A reinstall would require ton of time to document and reinstall all my software then move the data.  Hopefully this works but somehow I believe their will be another chapter in this post.