What is "zbrush"? Where does one find/get it? UV mapping can be a REAL tedious ordeal (I'm in the middle of it right now), so anything which can speed up the process would be appreciated.
Creating a UV map is technically easy but does take some thought. Assuming you're working with polygons (NURBS already have a UV layout), you first need to figure out which PROJECTION will work best (Edit Polygons>Texture>Planar/cylindrical/spherical/automatic mapping).
If your surface is flat or nearly flat, a planar projection will work best. If roughly cylindrical or spherical, those may work best. If you don't know, or if the object you are mapping is complex, automatic mapping is probably the way to go.
The first step would be to assign simple colors to the various parts of your object (either to the entire object, or just to certain faces). Then you select that object (or the faces you colored) by "selecting object with material" via your hypershade.
You should have your UV Texture Editor panel visible in one of your windows at this point. Let's say you have a planar projection. You want that planar projection as flat as possible, so before projecting, switch to a front or side (or top) view, and make sure mapping by camera is selected in your planar projection options box. Hit "Project", and you'll see your newly projected object in the upper right quadrant of the UV Editor. Using the manipulator, move the map out of that quadrant (so it doesn't get all tangled with everything you haven't yet mapped). Switch to "UVs" (ie when you would left click over an object to select either faces, edges, vertices, or UVs), and start looking for overlapping UVs (a separate subject).
When all your UVs are in place, you then switch to "faces" and assign it a checker (or similar) pattern to get a better idea of how the real texture you plan to use will deform.
When satisfied, move the map back to the upper right quadrant, and with all the UVs selected, choose "UV Snapshot". The snapshot can be saved as a .jpeg or whatever and imported into Photoshop or whatever paint program you wish to use.
Hope this helps!
Maybe I will do a tutorial on this someday, as it took me forever to figure all this out!
"Ad astra per aspera..."