I just downlaoded and unzipped Limewire from sourceforge.

The read me text mentions this

You must place Sun's JRE in the path prior to launching LimeWire.

I am running sun java V6 so that's fine, but what does the above instruction actually mean, what path and how do I do it (whatever 'it' is)

I tried running the comand as given
douglas@desktop:~$ sh ./runLime.sh
sh: Can't open ./runLime.sh
but it won't run.