Here is how you can take a hi res mesh, resurface it, then project the detail and color of that Hi res mesh to your new retopologized mesh. Very cool stuff.
my Zbrush 3 model, also posed with transpose in zb3 http://mojette.deviantart.com/
this will show you how to make a Link of a Movie automatically play instead of having to wait to download it, ill be using a zbrush video for this demonstration