To replace the *glass*, which I'm assuming is what you mean (not the LCD - they're separate in this phone, for once!)
Follow the "replace HTC 7 Pro memory card" instructions to remove the first back piece. Next, remove the screws in the next plastic back and remove it as well (it'll be easier to remove as it's just screws and contacts - no clips or wires). At this point you should see an exposed PCB, and your phone's hinge (a set of springs).
Undo the 4 screws holding the hinges on, along with the two screws holding the "pop-up" bezel (there are access holes for them - it'll make sense once you get there).
Slide the hinges across the back of the display (like you were opening the phone, but pull by the hinges! otherwise you'll break the display cable) and you'll see two screws which hold covers onto the back of the display panel. Undo the one for the bottom panel and pry the plastic bottom panel off from the back to gain access to the touchscreen connector.
Next, take a heat gun to your display and pry the glass off - I hope your glass is shattered and that's why you're replacing it because otherwise this is hugely difficult - the glass is glued on and glued on tight!
You'll see the glass is attached via flex cable thru the plastic to a connector inside the back - this is why you had to take your whole phone apart! Carefully lift the tape covering the connector, flip up the connector, and remove the old touchscreen ribbon cable and chip. Thread the new one through and reverse steps to install.
I just used the remainder of the old glue to stick my new display on, by setting it under some heavy books overnight. Your mileage will probably vary - I'm not too picky and a slightly loose/mushy screen beats a shattered one for me so I just left it at that.
Otherwise you'll probably have to figure out how to glue the display glass back on properly.