John,

with the latest rpm you should not need to set up your path to get LimeWire running.

0. become root
1. Get the latest java from http://www.java.com
2. Get the latest limewire rpm from http://www.limewire.com/LimeWireSoftLinux and install it
3. delete the file /usr/lib/LimeWire/runLime.sh and download this one on top of it:
http://www.limewire.org/zlatin/runLime.sh
4. chmod 755 runLime.sh

then type "limewire" in the terminal and it should run, or at least print some helpful debug information.