The english installer does use installshield. The international one uses InstallAnywhere and installs Java 1.3 (and enforces that LimeWire use it). You'll actually see better performance if you install an international JRE of Java 1.4 or higher and use the English installer.
If you're having problems uninstalling LW then try the installer cleanup utility on the international LW.
Update your intallshield engines. Make sure you still have Java 1.4 on your computer. Try again.

If still having problems with your installation, you can try is:
1. Repair LimeWire using the Add/Remove Programs utility
2. Right-clicking the Limewire icon and going to properties and changed compatability setting to Windows 2000.
3. Update your Java version 1.4.x OR version 1.5 (take the JRE)
4. Trash the LW Preferences folder called .limewire (whilst LW is closed!)