I have built a tool that provides an user interface and would help developers in setting up the arguments for Solution Packager. All you need to specify desired parameters for respective Pack or Extract Operation. This utility also has an interactive command window dedicated to Solution Packager.
This tool works with native Solution Packager executable provided by Microsoft Corporation, and needs to be specified in this tool.
You are most welcomed to write your feedback and issues on this post or you can email me on abhishek_255@hotmail.