I want to install ICS on my HTC Desire S. I am downloading the RUU from the HTCDev website, which I think is the right thing. The full source path is http://dl4.htc.com/RomCode/Source_and_Binaries/RUU_SAGA_ICS_35_S_HTC_EU_14.01.401.2_20.76.30.0835_3831.19.00.110_275068.zip
I have seen many confusing and contradictory statements about how to go about installing this. Can anyone please confirm
a) that this is the right file to use
b) how on earth I go about installing it when I have it, (or whether in fact I am wrong in thinking I want ICS in the first place.) If possible I'd like idiot proof step by step instructions.
Apologies if this does not make sense - I'm a total newbie in the Android world