Open the terminal and type limewire or runLime.sh..Might have to be root in the term so type su then press enter then enter your password and press enter..It should start then..do a search in your files to find where its located, then you can make a desktop link (search mandriva fourms for more info)..

Being as its Pro, you paid for support i belive..

Most of the times it puts it in the Internet part of your start menu.
And java was installed first correct?