GTA IV iso Modding? (LCPDFR 1.1)

I had a friend ask me if I could find out how to get a mod called LCPDFR 1.1 for GTA IV without needing JTAG/RGH, so I was wondering if anyone had any leads on how to do this via modding the .iso file before burning? I know this is possible with other hacks, perhaps far fetched but is it possible? Thanks for any info.

PC only bud. Nothing else.

Thanks, wasn’t quite sure. Seemed likely since usually just the basics are affected in iso mods.