..... or simply open Poser 7RuntimeLibrariesCharacterPoser 1-5Poser 2 LoCasual Man P2 Lo.cr2 in CR2Editor, select the hand and look for:-

 alternateGeom rHand_2
 {
  name GetStringRes(1037,2)
  objFile 2002 :Runtime:Geometries:maleHandsLo:rHandShape_2.obj
 }

and in the hand channels:-

  geomChan handGeom
  {
   uniqueInterp
   name hand type
   initValue 0
   hidden 0
   forceLimits 4
   min 0
   max 19
   trackingScale 0.045
   keys
   {
    static 0
    k 0  0
   }
   interpStyleLocked 1
  }

Use these lines as patterns for your figure.