If you would like to install JasperServer and not use the installer binaries, there are "stand-alone" war versions of JasperServer.
On-line documentation has been added to the site to support the installation of the stand-alone wars for both the Web UI version of JasperServer and the Web Services version of JasperServer.
Go to the Documentation section of the Home Page and look for the following links:
Stand-alone War Install Guide
Stand-alone War Web Service Install Guide
There are both HTML and PDF versions of these documents.