From the ad:

Features:

Precise guides for spot lights.
Precise guides for point lights
Precise guides for cameras

Automatic update, manual update
Low, medium or high resolution
Lots of options, like display style, visibility.

Product Includes:

One script for the guides.
One Poser 8 specific graphical user interface.
One scripts menu launcher (+ another for Poser 8)
One launcher cr2
etc Detailed documentation

Since this is for spot lights and point lights (as opposed to infinite lights) I'd say that it doesn't address IDL specifically, because you set IDL in your render settings, not in your lights.

Dunno - I don't use this product (I thought LaurieA did, tho?). I really don't give IDL very much thought, since it's just something I use to give whatever scene more "there-ness" ... so I just have it set up in my render settings and that's it.

Hate to say it: to gedt decent renders in Poser, there are no shortcuts. You sort-of have to read a bit. Try the lighting suggestions I gave you above if you're doing an outdoor scene:

Image is clickable. And skin shine is low... I'm aware of it... going to change it in the shader (using matmatic).

Monterey/Mint21.x/Win10 - Blender3.x - PP11.3(cm) - Musescore3.6.2

Wir sind gewohnt, daß die Menschen verhöhnen was sie nicht verstehen
[it is clear that humans have contempt for that which they do not understand] 

Metaphor of Chooks