PegLegPete (I know nothing about lighting however...) - there's  a really cool lighting thing you can do in poser pro 2010.
delete all lights.  put in one point light and position it above your character.  go to properties and bottom right change to inverse square.
then render with IDL turned on.
if u have trouble manipulating your light, try increasing the scale until u can see it easily.  (this doesn't change the lighting)
Love esther
ps if you use gamma 2.2 then use a python script to turn it off for transmaps and bumps back to one.  if the skin looks  too grey and u want it pinker, turn off gamma in render settings (uncheck box) and set tone mapping to HSv 2.2

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