The INI file that IN_LoadPenSettings opens must contain vector pen settings in the following format:
[HPGL]
Pen X=value units color [dash-size1 space-size1 dash-size2 space-size2]
where X = integer from 0 through 255
value = width of the pen line
units = pts, twips, in, ft, cm, or mm
color = RGB value corresponding to the color you want to use.
dash-size1 = the length of the first dash (if any) in a dashed line pattern
space-size1 = the length of the space after the first dash (if any) in a dashed line pattern
dash-size2 = the length of the second dash (if any) in a dashed line pattern
space-size2 = the length of the space after the second dash (if any) in a dashed line pattern
Image.ini is the default initialization file for Imagenation.