Did you replace only the thermal paste?
You kept your origanal logic board and you did not buy a new logic board? Ah yes ive had a better look at the images you posted of inside your MBP:) Youve just cleaned your machine and reapplied thermal paste.
Cheers for the pics. They add more visual info to the ifixit instructions.
This raises a question for me as, ok i could take my MBP apart, do what you have done. But then why are Apple not looking at this as a possible way of extending the life of a 1.1, 1.2 generation MBP with ATI Radeon x1600.
A clean and correct amount of thermal paste reapplied.
Or would even that be asking too much in terms of Apple making an attempt to address the problem for now. They wouldn't have to replace any expensive parts, but at least it looks like they are bothered about the problem.
However, you have to question if there was not a problem with the logic board GPU, then why for customers under apple care are they replacing the whole logic board. Surely they would just clean it and reapply the thermal paste....??????? Does that not indicate that apple actually do know there is a problem, that there is defective hardware, that heating in MBP's is a huge issue, even with newer MBP's ???
It will be interesting to know from here on in, how long your MBP survives without a freeze or a lock-up, compared to someone who has just had there logic board replaced.