./LimeWire17: line 1: 5979 Abgebrochen "/usr/lib/jdk1.1.8/bin/jre"

That part looks significant. It seems as well as the lastest JRE you have an old JDK installed, 1.1.8. Unless you really need it, I suggest you remove it. It seems that LimeWire is using this version of java instead of the 1.3.1 version. This explains why the Swing classes weren't being found (the Swing classes are new, relatively speaking).

Remove the old JDK and try again. Make sure you add the Java 1.3.1 bin directory to your PATH variable. Additionally, you shouldn't need to include the changes in the lax file now either. Java should find rt.jar by itself.