Make a copy of the dolphins cr2 file (in libraries:characters animals) and then edit the two lines with figureResFile to point to your newer uvmapped dolphin, then try loading this into poser. If you just want to widen a body part you can use the scaling parameter dials, you don`t need a morph. To add a morph you have to make one first. Dr geep has a tutorial here about making morph targets.