Located in your GTA IV installation directory (specifically within Grand Theft Auto IV/pc/models/cdimages/ ), playerped.rpf is an archive file. Rockstar Games uses the .rpf (Rockstar Protected File) format to package game assets.
: If a mod doesn't look right or causes "taxi bugs" and disappearing textures, having the original file allows you to reset instantly. Update Compatibility gta 4 playerped.rpf backup