Desperate with install failure nightmare challenge

I have a MacBook Pro where my hard drive was partitioned with Boot Camp and using Parallels without any issues until the upgrade. From what I gather from two days of dropped calls and various bits of information which our IT guy's say is bunk, I may be sunk.

I should start with my Parallels VM and the XP Operating system has been getting automatic updates and is now on Service Pack 3, but since I never boot to the Windows side of partitioned hard drive it is still with whatever version of XP Service Pack 2 that was available when the initial installation was made back in April or so, this year.

I was been sent one set of instructions from a Parallels Engineer that says the fix is to prepare and XP Boot CD with Service Pack 3 and I can install and remove Boot Camp and reinstall. Now since I have clearly stated that I don't want to loose my current data, it has been said that this is the fix.

Here was the email from yesterday

We managed to find the solution. Please follow steps 1-8 from this KB article:

http://kb.parallels.com/en/5447

We will call you tomorrow to check the status of the issue.

Best regards,"

BTW, I emailed and asked for return call and none ever came and I removed the engineers name from the email.

Today after being on the phone with multiple attempts to go to L1 Support and 5 hours of disconnected calls to Level 1 technical support, I finally got to an engineer who told me to call Apple and they would repair Boot Camp and all would be good. Our Technical Support debated with the Parallels Engineer about repair and that it could not be accomplished without destroying of the data and we were assured that that was not the case. I mentioned that there are no warnings and documentation about Service Packs that may have been installed by Windows updates on the Parallels VM and he said "everyone knows that is not good and gave some analogy about pulling up to a gas station and putting diesel fuel in a gas engine", go figure. In any case, I called Apple Support and they said the only way to repair Boot Camp is to remove and reinstall and all data would be lost.

The challenge is how can I revert to Parallels Version 3 or somehow fix the Boot Camp so it will start? I have a lot of data that I don't want to loose and this is my last hope that there is someone who actually can help and give me the straight story.

If you know how this can actually be resolved without loosing all my data, please contact me and we can discuss a payment for your efforts. I am not a techie, but this is a lousy upgrade with terrible installation and documentation.

Tom