in Cent os 6.2 can i update Kernal version to 3.4 ? if so how to upgrade kernal

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http://serverfault.com – Hi i have a server with Centos 6.2 .with Kernal version 2.6 But as i need to increase my application Performance the Kernal Version 3.4 has x32abi which can improve the performance so i want to upgrade to 3.4 ? Is it possible I tried 1) downloading kernal compiling and installing but still i see the same Kernal version what went wrong i follwed the below link process http://www.tecmint.com/kernel-3-5-released-install-compile-in-redhat-cen... (HowTos)