Loading jfx app into web browser with preloader (improving load time)

hi,
has anyone made any attempt to construct kind of application preloader, waiting for whole app to load can take long time and default spinning wheel with java cup is not really user friendly.
I was thinking about breaking app in two parts
1)login view
2)rest of the app that will be loaded lazily
but then how to load second jar, what about updates of that second jar. Is there any way to talk to javascript in browser to show something nicer then default applet's preloadder.????
maybe there is a better idea on how to improve loading time of jfx app embedded in web browser, my experience is based on 1.1 version of jfx so now it can be better.
apart from jfx component im planing to use spring ioc and jdbc driver. so it should show something as quick as possible (confirm certificate and show login view) and then (or in the meantime) load rest of the stuff.
any thoughts appreciated
thanks

Have you read the last post of (the prolific ;-) ) Rakesh Menon ;-)
http://blogs.sun.com/rakeshmenonp/entry/javafx_lazy_loading
May be it could help you.
Regards
Richard

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