i prefer the ZBRUSH UV setup quick and painless with no loss check out my thread on here for a look at my ZRUSH UV map
first thing i suggest you do is go to
www.pixologic.com and download the 20 meg practical guide, it shows you how to set up normal maps and displacement maps aswell as some nifty tutorails for organic modelling one tutorial actuly dhoes displacemnt and texturing a dinosaur like creature so could be helpful to you