trash every LimeWire shortcut installer you currently have on your desktop, temp folders, and anywhere else on your hard drive, completely uninstall LimeWire and Java, reboot your computer, get the JRE from Sun's website:
http://java.sun.com/j2se/1.3/download-windows.html
install that, reboot your computer, get LimeWire's alternate Windows installer, and try installing that.
zbell