I didn't read all the threads but in the first thread he already openrd it up so no harm in doing it again.
I would give this a shot too if I were you.
Also since it is open you might want to replace the heatsink and all other fans. Fans are cheap. This will eliminate problems later as cooling goes because you'll know that the fans are new and in good working condition.
I have a Toshiba Sat. and it is a P4 3.2 gig besides that mashita or whatever dvd/cd/cdrw drive it was a good buy and never had a overheating problem with it. I don't know what you paid for your laptop but there is an old saying that goes like this : " You get what you pay for"! I'm not at all saying anyones is cheap but it is an old motto that must be kept alive.