Do you actually mean PP2010?  PoserPro does not have IDL as it is a derivative of Poser 7.  You can still use VSS and BB's envsphere under both situations.  The only factor you must consider is Gamma correction, both Pro versions incorporate Gc in the render settings.  This means that using VSSPR3 and envsphere, you must have internal Gc settings of 2.2 when rendering in the non-Pro Poser versions.  This is, of course, if you intend to apply material gamma correction to all your model's material zone.  Since Gc can be controlled in render settings of both Pro versions, material Gc for VSSPR3 and envsphere must be reset to 1.  The exception to this rule is any recent shaders BB has released which contain auto sensing of render Gc.  This includes VSSPR4.