Xperia Play help (overclocking) topic

Hi, i have recently got myself an Xperia Play R800i and i have noticed that this phone can be Overclocked to 1.4GHz due to the fact it is an Underclocked version of a 1.4GHz CPU, i would like to Overclock my Device, but i'm on stock ROM and stock Kernel. (i'm rooted though, with BusyBox)
My bootloader is not currently unlocked and i would not like to wipe my phone if that is avoidable.
My Details are below:

Android Version: 2.3.4 (GB)
Kernel: 2.6.32.9-perf
Build No: 4.02.A.0.42
Model No: R800i (GSM)

I'm not so tech savvy as some people on here so please don't go into too much detail, but can i have an explanation on how i can Overclock my device easily?



Thanks in advance,

Zomboid