Does installing the clockworkmod recovery require rooting galaxy s2? Does installing the clockworkmod recovery require you to root galaxy s2 gt-i9100? 

In the link here
it seems the rooting is not required. However I have read that rooting is required for installing the CWM

Can anybody help with this? I am complete noob!!!

I am trying to install Cyanogenmod on my galaxy s2 

Model number: GT-I9100

Baseband version: I9100DDLPB

Kernel version: 3.0.15-1056084 dpi@DELL168 #3 SMP PREEMPT Wed Aug 22 22:55:24 KST 2012

Build number: IMM76D.XWLPW
In general, no you should be able to install CWM with needing to root, but most of the tutorials I have seen for the S2 GT-I9100 involve rooting the device.

Here are a couple links that may be of interest to you.  I do not think you will need to root to install CWM.  

As always, proceed with caution when flashing.

Galaxy S II GT-i9100 Install CWM &amp; Root

Samsung GT-I9000 Galaxy S CyanogenMod install: Flash ClockworkMod Recovery

INDEX of GUIDES/TUTORIALS: SGS2 GT-I9100