Problem with images in .jar file

Hi all!
I've got a severe problem when deploying an application via web start:
the images withhin a deployed .jar file are not found.
So far I've tried a number of things to get the images back, none of which are working.
I've found different threads concerning this topic, e.g.:
http://forum.java.sun.com/thread.jspa?threadID=396363
http://forum.java.sun.com/thread.jspa?threadID=465795&messageID=2141351
but sadly, they didn't help me out.
Here is my code I'm using:
private ImageIcon loadIconFromClassLoader(String tszRelPath)
    ImageIcon tIcon = null;
    cCat.info("tszRelPath = "+ tszRelPath);
    // this line simply leads to a crash of the whole application
    //tszRelPath = tszRelPath.replaceAll("\\", "/");
    if(!tszRelPath.startsWith("/"))
      tszRelPath = "/" + tszRelPath;
    cCat.info("modified tszRelPath = " + tszRelPath);
    URL tURL = ClassLoader.getSystemResource(tszRelPath);
    if(tURL == null)
      // this too crashes my application
      //tURL = PlainResourceProvider.class.getResource(tszRelPath);
    if(tURL != null)
      tIcon = new ImageIcon(tURL);
    return tIcon;
}I've also tried
PlainResourceProvider.class.getClassLoader().getResource()PlainResourceProvider is part of the .jar that involves the images.
Of course all the .class files in the .jar file are easily accesible
I would be so thankful, if just anyone could help me to solve this problem.
I am going crazy.
Thanks in advance, Christoph

You should take care of the directory structure according to the package structure.
I for example have this jar:
C:\source\java\ebank2_util\smsunlock>unzip -l pro-ebank_sms_unlock.jar
Archive: pro-ebank_sms_unlock.jar
Length    Date    Time    Name
      0 10-28-05 17:27   hu/
      0 10-28-05 17:27   hu/khb/
      0 10-28-05 18:17   hu/khb/smsunlock/
    256 11-07-05 16:33   hu/khb/smsunlock/DButils$MySQLException.class
   4229 11-07-05 16:33   hu/khb/smsunlock/DButils.class
   1700 11-07-05 16:33   hu/khb/smsunlock/GUI$1.class
   2318 11-07-05 16:33   hu/khb/smsunlock/GUI$2.class
    988 11-07-05 16:33   hu/khb/smsunlock/GUI$3.class
   1402 11-07-05 16:33   hu/khb/smsunlock/GUI$mywl.class
   5630 11-07-05 16:33   hu/khb/smsunlock/GUI.class
    818 11-07-05 16:33   hu/khb/smsunlock/LimitedLength_TextField.class
   2452 11-07-05 16:33   hu/khb/smsunlock/Main.class
    900 11-07-05 16:33   hu/khb/smsunlock/MyInputStream.class
      0 11-07-05 16:33   META-INF/
     98 10-27-05 15:53   META-INF/manifest.mf
     90 11-07-05 16:33   hu/khb/smsunlock/properties
20881                    16 filesAnd the resource is loaded like this from hu.khb.smsu.Main:
InputStream is = new MyInputStream( Main.class.getResourceAsStream( "properties" ) );

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