Download the inspire 4G hack kit and follow the directions to root your phone. Download the ROM to your pc and then transfer the zip to your SD card. Now that you have root you should have clock work mod. Press and hold the power button and then select restart then select recovery. You should then boot up in CWM. Clear factory rest, then clear dalvik cache then select install zip from SD card and find your ROM and install. There are many threads on this if you need more instructions. If you found the ROM then you can find out how to install it on the same thread most of the time.