Well, and what does "java -version" return now? If it still returns "Command not found" or something similar, the path to your java binaries was wrong. Try again:

export PATH=$PATH:/path/to/java/bin

/path/to/java/bin could be something like
"/usr/lib/java/bin" or "/usr/local/lib/jdk1.4.1_02/bin"

What nDiScReEt meant was, that once you have found the path to your java binaries, the user who wants to start LimeWire has to add this line:

export PATH=$PATH:/path/to/java/bin

to your ~/.bashrc or ~/.profile file. If you don't add this line you would have to readd the path to your java binaries to your $PATH each time before you start LimeWire (you could also edit your runLime.sh script).

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Morgens ess ich Cornflakes und abends ess ich Brot
Und wenn ich lang genug gelebt hab, dann sterb ich und bin tot

--Fischmob