Well, mobelgod beat me to it. From the enclosed 'Read Me' text file:

*There are several options that you can change by editing the script in a text editor:

....

• globalIllu: when set to 1 or 2, you can set global illumination parameters; this
      is a hidden feature in Poser 7; if GI is on (i.e. intensity is different from 0)
      you need to turn on raytracing, otherwise Poser might crash; the GI bounces only
      work in Poser 7 SR3, hence set globalIllu to 2 for SR3, otherwise to 1.*

But be warned, GI really slows things down, and if using transmapped hair, be prepared for a long wait!

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Windows 10 x64 Pro - Intel Xeon E5450 @ 3.00GHz (x2)

PoserPro 11 - Units: Metres

Adobe CC 2017