I hear there are some issues with the LW Installer. Suggest you download
http://www.stuffit.com/mac/standard/index.html the free (trial) version...(there is no stuffit Lite anymore?) do not use shrink to decompress any files. 1st make sure you have the MRJ 2.2.5 update installed. Use Stuffit Expander...above to decompress the updater. Search your drive w/ sherlock and trash anything Limewire. Download your LW installer, Expand w/ stuffitt and reinstall. Make adjustments to memory allocations for LW and MRJ. And finally launch the LW app.
I did have issues w the installer. the log kept saying" installation successfull,
nonfatal errors"...I kept trashing everything and reinstalling untill I no longer got those messages.

good luck and have fun!
keep us posted...
& don't give up.

Dave