HTC Sensation SuperCID, Rooted, Hboot Version 1.20 Running ICS 4.0.1
NEW UPDATE RUU FOR ICS 4.0.3
MAKE SURE YOU HAVE SUPERCID (if you dont know what that is DO NOT FLASH!)
download the firmware from the link above then place the file on the root of your sd card. from there reboot into your bootloader (From off press the power button and the volume down button at the same time untill you get the screen shown. from their just follow the instruction on the phone to update.
Please Give Thanks to RMK40 on XDA
Best Regards, And Enjoy!