Note that the international version (that comes with InstallAnywhere) installs Java 1.3.1 in all cases in the "jre" subdirectory of LimeWire. The large size of the download is caused by the bundled Java package, which is not necessary if Java is already installed and usable systemwide.
InstallAnywhere does not check, before installing that Java is already present, and runs the Java installer to create another instance of that run-time.
In my opinion, the installer in InstallAnywhere should first test the presence of Java, and should ask the user wheer he wants to use it. Also, it should be possible to create a light Installer, which will, when needed, download the Java package or ask the user to install it. The upgrade would be much faster without this Java bundle which is never needed when someone upgrades...
Installing Java in LimeWire is a bad idea, it's just waste of resource. The installer should install Java as a separate product, that can be used by all applications (including Internet Explorer and Netscape)