That ROM is for the Sensation, I would strongly suggest you don't try and flash it as it will mess up your phone pretty bad
You can find the DHD version of Android Revolution here -
http://forum.xda-developers.com/showthread.php?t=840040
Regarding the radio, you need to flash a new radio
only if the signal/reception is bad after you flash the new ROM. Some ROMs may not give the best performance with the radio you have (which controls the voice and data reception) and you would install the recommended one to fix this. However, more than likely you will not need a new radio, and it is a risky process flashing a new one. If you find your reception to be very bad (or non-existent) then come back here and we can sort you out
