Since you seemed to be able to fix that problem so easily have any idea how to fix this one:

"C:\Temp\limewire\core>set JAVA_HOME=D:\Programs\JavaSoft\JRE\1.3.1_03

C:\Temp\limewire\core>set CLASSPATH=.;lib/collections.jar;lib/xerces.jar;lib/MRJ
ToolkitStubs.jar

C:\Temp\limewire\core>
C:\Temp\limewire\core>ant
Buildfile: build.xml

init:

core:
[javac] Modern compiler is not available - using classic compiler
[javac] Compiling 172 source files to C:\Temp\limewire\core

BUILD FAILED

C:\Temp\limewire\core\build.xml:57: Cannot use classic compiler, as it is not av
ailable A common solution is to set the environment variable JAVA_HOME to your j
dk directory.

Total time: 2 seconds"

I don't know what the deal is...
I installed that jre and the jdk or whatever and set the JAVA_HOME to various different directories, that was the only one that got even that far, set to any other directory it would just ant bad command or filename