If your CPU temps are in the upper 40s at max you have nothing to worry about. Checking your temps as soon as you get out of a game is really not quick enough to see max temp reading. It's probably at least 5C above what you are seeing and that's if you are fast.
The best way to spread AS5 is with something like a credit card so you can get an even application. BTW, I think AS still has a step by step tutorial on appying AS at their site.