New to Java

I have installed this j2sdk-1_4_2_11-nb-5_0-win.exe This states that NetBeans 5 is bundled with the installed jdk.
However after completing the install, I found that Netbeans 6.0 was installed and not 5.0 I initially had NB6, but it kept freezing on me (application not responding).
Further on starting NetBeans I received these messages:
1 Warning - could not install some modules:
OpenSource PC - The module named org.netbeans.modules.j2ee.dd/1 was needed and not found.
OpenSource PC - The module named org.netbeans.modules.j2eeapis/1 was needed and not found.
OpenSource PC - The module named org.netbeans.modules.j2eeserver/4 was needed and not found.
Sun Java System Portal Server 7.x - The module named org.netbeans.api.web.webmodule was needed and not found.
Sun Java System Portal Server 7.x - The module named org.netbeans.modules.j2ee.dd/1 was needed and not found.
Sun Java System Portal Server 7.x - The module named org.netbeans.modules.j2eeapis/1 was needed and not found.
Sun Java System Portal Server 7.x - The module named org.netbeans.modules.j2eeserver/4 was needed and not found.
PHP Editor - The module named org.netbeans.api.gsf/1 was needed and not found.
PHP Editor - The module named org.netbeans.api.gsfpath/1 was needed and not found.
PHP Editor - The module named org.netbeans.modules.gsf/1 was needed and not found.
Sun Java System Web Server 7.0 - The module named org.netbeans.modules.j2ee.dd/1 was needed and not found.
Sun Java System Web Server 7.0 - The module named org.netbeans.modules.j2ee.sun.appsrv/1 was needed and not found.
Sun Java System Web Server 7.0 - The module named org.netbeans.modules.j2ee.sun.dd/1 was needed and not found.
Sun Java System Web Server 7.0 - The module named org.netbeans.modules.j2ee.sun.ddui/1 was needed and not found.
Sun Java System Web Server 7.0 - The module named org.netbeans.modules.j2eeapis/1 was needed and not found.
Sun Java System Web Server 7.0 - The module named org.netbeans.modules.j2eeserver/4 was needed and not found.
Generic Portlets - The module named org.netbeans.api.web.webmodule was needed and not found.
Generic Portlets - The module named org.netbeans.modules.j2ee.dd/1 was needed and not found.
Generic Portlets - The module named org.netbeans.modules.web.project was needed and not found.
JavaFX Editor - The module named org.netbeans.api.gsf/1 was needed and not found.
JavaFX Editor - The module named org.netbeans.api.gsfpath/1 was needed and not found.
JavaFX Editor - The module named org.netbeans.modules.gsf/1 was needed and not found.
jMaki Ajax support - The module named org.netbeans.api.web.webmodule was needed and not found.
jMaki Ajax support - The module named org.netbeans.modules.j2ee.dd/1 was needed and not found.
jMaki Ajax support - The module named org.netbeans.modules.j2eeserver/4 was needed and not found.
Base PSFramework - The module named org.netbeans.api.web.webmodule was needed and not found.
Base PSFramework - The module named org.netbeans.modules.j2ee.dd/1 was needed and not found.
Base PSFramework - The module named org.netbeans.modules.j2eeapis/1 was needed and not found.
Base PSFramework - The module named org.netbeans.modules.j2eeserver/4 was needed and not found.
6 further modules could not be installed due to the above problems.

2 Warning - could not install module JPDA Debugger API
JPDA Debugger API - This module requires JDKHOME/lib/tools.jar to be accessible.
This file was not found. Usually this means you are trying to run the IDE with the JRE instead of the full JDK.
If so, please use the --jdkhome command line option to specify a JDK installation.

3 Warning - could not install some modules:
Java Debugger - None of the modules providing the capability org.netbeans.api.debugger.jpda.JPDADebuggerEngineImpl could be installed.
JPDA Debugger API - This module requires JDKHOME/lib/tools.jar to be accessible.
This file was not found. Usually this means you are trying to run the IDE with the JRE instead of the full JDK.
If so, please use the --jdkhome command line option to specify a JDK installation.
21 further modules could not be installed due to the above problems.

I have jre6 installed separately. Can anyone advise me on the above messages?

Richard.