When creating a distribution file for distributing software over a network, instructions for automatically invoking instructions for installing software can be placed in the software distribution file. If an installation program, the software, and the instructions are placed in the software distribution file, a single user action can download and activate the software distribution file, leading to automatic installation of the software. The installation can be accomplished without further user input. The software distribution file can include an extractor for automatically extracting items in the distribution file.