Right what is the latest emplode and where is it hidden

I think you mean where is the latest Jemplode and that jemplode.jar file is hidden here:

http://www.inzyme.com/rio/empeg

Remember that you also need the RMM Lite Jar and the riorid jar from the site I linked above.

The command line stuff is that in windows or can i do it on the mac

I think you can do it on the mac, but I'm not sure exactly how it's done. I don't believe it starts with "java.exe -jar" any more, but I would guess the rest of it would be the same.