Sprint doesn't need this hack to get the Rev-A speed or the unlocked GPS anymore. If you upgraded your ROM to WM6.1 you have this already, this thread was started before there was an official wm6.1 upgrade from HTC and Spring. For turn by turn GPS you will have to pay for it, no matter what - however you can still get some GPS support from free apps, like Google Maps and Live search. Sprint actually comes with live search, and Manila2d will add googlemaps. Keep in mind all you're paying for is the software, the wm6.1 unlocks the gps function on the chip and the Rev-A radio.
*EDIT*
http://www.phonescoop.com/phones/p_f...294&fi=1798549