Are there java based auto updaters other than WebStart & Eclipse P2?

I am working on a Java application and we are committed to making it easier to deploy updates. Until now, we have always just posted new install packages and added sysadmin to our client sites for updates that hurt a lot of users.

what I would like to do is something similar to java webstart (or eclipse p2) - when starting the application, it checks for updates at the specified location and then downloads the updates before starting.

But here's my problem - I want more control over what is done outside of the plugins and jar files. For instance:

• I would like to be able to update my JVM (we ship a modified version with additional security features).
• I need to install a DLL - maybe locally in jar files, sometimes in windows
• Sometimes MSI is launched to install Windows components (such as printer drivers).
• I need to modify config files and registry.

I've found several apps that support this (e.g. AppLifeUpdate at http://www.kineticjump.com/ ), but they tend to target .NET and it seems a little flawed to present .NET's dependency on a Java application;)

I know I could write my own here, but if there is already a third party library out there that supports this object it will make my life easier.

So, does anyone else have a similar problem and what products can I look at?

Thanks Brian.