Help problem with updating android version

[jeetbl1a]

hello,
i am using samsung galaxy s 2 gt i9100 with
android version 2.3.6,
kernel version 2.6.35.7-i9100xwkk2-cl726411
root2dell88#2,gingerbread,xwkk2

i want to update android version 4.0 icecream sandwich.

so i want to known wheather it is possible to change this,if yes i kindly request that any one can help me

 

[led hed]

two choices, root it and install a ics rom or wait for the official release, which i am doing, waiting.