Web Start running with other applications

I've been doing some research on Web Start and I was just wondering if someone could give me some clarity on a couple of questions.
1. If two applications require two different JREs (1.4 and 1.3) is it possible to run them simultaneously?
a. Both applictions running on Web Start simultaneously
Now I know you can specify a certain JRE to a certain product by specifying the href in the JNLP file ... will this solve that issue? Or am I going to need two seperate JVMs going through IE somehow (read a suggestion from another thread about using two JVMs)?
b. One running on Web Start and one not running on Web Start simultaneously
eg. If I open one application with web start (uses 1.4) and later try to open another application that requires another certain JRE (uses 1.3) to run that isn't using web start (eg. an .exe file) (or vice versa) ... what will I need to do ... (seperate JVMs ... or is it not possible?)
2. Also ... I've read a thread that when you use Web Start it doesn't make the JRE the default of the OS ... is this true?
I would appreciate any help with these questions ... thanks ahead of time.
-- Derek

The short answer to both of your questions is yes.
You can run two apps on the same box with different JREs , this is specified in the JNLP file with the j2se element in the file.
<j2se version="1.5+" href="http://java.sun.com/products/autodl/j2se"/>
Also this will not affect any other JREs you have installed on your system, i.e. it doesnt screw up any of your path or classpath variables in the registry, the directory for the jre bin where javaws is at is determined at runtime from a cached version of your jnlp file.
not sure if you were looking for something more specfiic ...
R
S

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