Unfortunatly Poser itself provides no easy way to zero all the morphs at once. Python is the way to go, from memory 'Poser Tool Box' by PhillC contains a zero morphs script, along with a lot of other useful scripts, Poser Tool Box is a commertial product, the last time I looked it cost 39.95 (I assume that's US dollars). There are also free scripts available to zero morphs. The free utility Morph Manager 4 (MM4) can be used to zero all morph targets in a cr2 (or pz2), you have to load a pz2 (any pz2) first, this forces MM4 to display an extra button 'More Options' from which you can select 'Zero all morph targets in file', unfortunatly this only zeros the morph target (targetGeom) channels, not any FBM master (valueParm) channels. An old version of MAT Pose Edit (v2.0.0) used to have an option to 'Zero everything' which was very handy, but I don't think that version is available any more.