An IMVU .chkn extractor is a tool used to unpack the proprietary mesh and texture files generated by the IMVU Classic Creator Studio.
IMVU Studio Toolkit: For those using external modeling software, the IMVU Studio Toolkit for Maya helps manage asset extraction and import directly within the 3D workspace. Where to Find Your CHKN Files imvu chkn extractor
Introduction
XML Parsing: Read the index.xml file found inside to map how the assets interact. An IMVU