It's really easy and it will work fine. You will also register 2000 less miles than before. Atrimble and my friend Hon did this a while ago between a 2005 and a 2003.
Just unscrew a couple of screws from the top of the gauge surround that go up into the bottom of the dash, pull the surround out, take out 4 or so screws from around the gauge cluster, pull it out a ways and unhook the plugs from the back. Installation is the reverse of that.
Should take you a half an hour or less from start to finish.