Getting Oriented To OpenLaszlo
http://www.openlaszlo.org/lps/laszlo-explorer/index.jsp
This page has links to useful documentation. If you are unfamiliar with Open Laszlo, going through "Laszlo in 10 Minutes" is a good idea.
Next, the Developer's Guide, http://www.openlaszlo.org/documentation has more in-depth information on coding in Open Laszlo. I'd recommend getting the Nightly Build version of the Software Developer's Guide, as it will have the most up-to-date information for the OL4 release.
The forums are a good place to search for information on specific issues, or post questions: http://forum.openlaszlo.org
There is also a Wiki: http://wiki.openlaszlo.org/Main_Page
There are some excellent example applications, with source available, at http://www.openlaszlo.org/demos; I'd particularly recommend looking at LZPIX.
Download the 4.0.2 version of OL by going to http://www.openlaszlo.org/archive.
Installing OpenLaszlo
Unpack the software wherever you want to install it. Because it has its own embedded version of tomcat, there can be port conflicts if you already have tomcat running on your machine. To prevent any conflicts, edit <OL-Directory>/Server/tomcat-5.0.24/conf/server.xml.
** Change port from 8005 to 8006
<Server port="8006" shutdown="SHUTDOWN">
<!-- * X_LZ_COPYRIGHT_BEGIN ***************************************************
* Copyright 2001-2006 Laszlo Systems, Inc. All Rights Reserved. *
* Use is subject to license terms. *
* X_LZ_COPYRIGHT_END ****************************************************** -->
<Service name="LPS">
** Change port from 8080 to 8081
<Connector port="8081"...