EDIT: I am adding Joker's edits to the working ipatch file from the OP. See my followup post below when I finish and test.
The link *now* on the OP is correct and working.
I just DL'd it and did a comparison to original script.rpy, your modded script.rpy, and the ipatch script.rpy.
I can see this would double your work, but that poster does have a point; without the ipatch the dialog makes no sense at times, it's all "friend" instead of dad, mom, daughter, etc.
(I, too, would like the ipatch modded, but if you don't want to I understand.)