How can i reduce applet loading time?

I have recently begun converting a gui application to an applet. The problem i have is the loading time of the applet which can be several minutes.
The gui has a progress bar which tracks the loading of the classes, images and sounds etc, once this is up and running the loading time is fairly short, however it takes forever for the gui to actually begin to display.
The code for the classes is only about 150K altogether, there seems to a period of long modem inactivity once the applet is initialized before the gui is displayed.
How can i reduce the time it takes for the applet to initialize before the gui is displayed, otherwise users will thing nothing is happening and not bother loading it.
the applet is currently at http://www.winnieinternet.com/games/startrade2095/applet/startrade2095.htm
if you need a demo of the problem, although the applet is still work in progress.
Many thanks in advance for any help
W.Coleman
www.winnieinternet.com

Some suggestions could be:
1. Bundle all classes and resource files in a jar file.
2. Try to preload the heavier files (e.g. sound files) in a background thread, instead of init() method. See an example for this in Sun's Java tutorial, under the trail 'Sound'.

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