how reinstall kernel 3.9?

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http://forums.fedoraforum.org – Hi. Can anyone tell me how remove the new kernel 3.10 and reinstall the kernel 3.9 again? because I've having problems with kernel 3.10 and kmod-catalyst. First I tried to install mesa-dri-drivers but the fan speed moves very fast, and the temperature is close to 80C. searching in google I found that I can change the values of fan speed, but when I reboot the system, the values change to default values. With kmod-catalyst, the fan speed is low and the temperature is close to 35C or 40C, but with the new kernel 3.10, my desktop is very very slow, and the system sleeps more than 15 seco (HowTos)