Download it to your PC. Rename it according to the instructions. Connect your phone with the USB cable. Set it as a USB drive. Drag and drop your downloaded file onto the USB drive that is your phone. Disconnect. Shut off your phone. Hold down the power and volume down buttons until you see a white boot screen that looks like you did something wrong. Select HBoot or something similar...the one at the top of the list. It will find the downloaded file and flash it to your phone, which will seem as though it takes forever. Then it will be done. Awesomeness will now commence.