running OS 10.4.11

when i install limewire and open it i get:

"This application requires Java 1.6 or later, but only the following Java versions are installed: 1.5.0, 1.4.2, 1.5, 1.4. Updating to a newer version of Mac OS X may resolve this."

when i download java release 6 for 10.4, it will not let me select a designation saying......."your computer does not need this update"

when i download version 4.18.8 for OSX tiger, it tells me there is nothing to install when i try to install.

can anyone help me?

thank you

john