Poser to z-brush tutorials are rather few and far between, and since GoZ has only existed since sr3, I doubt you'll find much on the subject as far as tutorials go. They are out there, but they range in age for as long as zb has existed, and a lot of them are very out dated now. 

However there are some who have been working with poser and zb for quite a while now. I ran across a series of tutorials for texturing poser figures in zb not too long ago, I just don't remember who did them or where they were. But again, anything that is older than zb3 won't do you a lot of good, as the software has changed almost completely since then.

But you can ask questions here, since it is poser related. I'm sure the zbrushers here will be happy to answer what they know. Keeping in mind there are many different techniques depending on what you're doing, so you're likely to get several different answers. 

To get maps from ZB back to poser you need to use photoshop, as goZ for poser won't port the maps back directly. It will port them to ps tho, in .psd format. There are some things you need to do in photoshop. I think poser 2012 at least, reads psd files - not 100% sure on that right at the moment tho. 

 

~Shane