i didnt used daz in the last time, atm im working with bryce, but there is a Bridge in Daz for Photoshop.Did you tried that bridge to import maps into photoshop ? is working that ?

You might take a look at this tutorial how to use the bridge , i replied on youtube how to install properly that bridge in CS5

 http://www.youtube.com/watch?v=VJpRp6I52sQ

Hope it helps.Or you might need to search through your content folder 'till you find the texture maps images.