Abstract: Disclosed are novel methods and apparatus for provision of multi-platform, efficient, and/or lightweight software product installation. In an embodiment, a method of configuring a software installer is disclosed. The method includes: launching the software installer; receiving a request to launch a file while the software installer is running; the software installer accessing an application launch facility to determine a launching command for launching the file; executing the launching command to obtain an installation key; and the software installer installing a software product based on data provided by the installation key.