Compaq Presario V3000 overheat!

Hello everyone,
I made this mistake and bought a second HP Compaq notebook after first one died out on me.
But whatever it was not too bad here are the related specs:

AMD Turion 64 X2 1.61 GHz
1.5 GB of RAM
256 MB NVidia Geforce Go 6150

First of all, the laptop overheats. With that I mean as shown in Display Settings, GPU core temperature reaches about 120 C. That is one problem.
Other one and probably the most irritating one is that whenever I play a game, after 10 minutes or so games slows down, starts to skip as if my graphics card is not good enough to play. But I do play smooth initially for some time. When it does that, I minimize the game, close the lid and wait for couple minutes. After that it is fine again. If I don't do that after a little while whole system freezes, forcing me to restart.

Did anyone have these problems? Or any suggestions?

I use XP but I have the same problems on Ubuntu it doesn't matter.

Oh, it is Compaq Presario V3000.

Thanks.

Do you think that is the problem?
I will try that but how do you spray the interior? remove the ram/hard drive lids and that's it? or through the fans?

actually this laptop mentioned is the same exact as mine and I haev th esame issue - when it gets hot acpi kicks in and shuts the laptop down "abruptly" - This is because the thermal paster on the cpu has gotten so hot over time that it gets hard and cracks and leave air space between the cpu and the thermal unit - letting it heat up - need to get a cpu thermal kit and re seat the thermal unit with new paste

sucks huh??

I think so - I will never buy an hp laptop again, no matter how shiny they make them.