Copy from the files or manually code the following:<br />

*Increase the MAX_STR_ARRAYS macro by 1 (Line 46)

*Add two more elements to the Integer enum: GF_NO_ALGS and GF_DF_ALGO (Line 88-89)

*Create an enum called LightAlgorithm (Line 389)

*Allocate memory for str array and set it to LIGHT_DESCRIPTIONS (Line 67-69)

*Set the GF_NO_ALGS element to the number of algorithms (Line 70)

*Add virtual void populateLightingList(void*) = 0; to the interface (Line 29)

*Add a wchar_t variable to store the lighting description (Line 34)

*Add void populateLightingList(void*); to the header file (Line 54)