sorry for not responding to any questions or requests, but i haven't been here for a while.
i have some good news! i've decided to create a totally new addon for XBMC Eden called "Advanced Wake On Lan", which incorporates several feature-requests stated here:
- removed pinging sound
- ability to autostart script with XBMC
- ability to wake different servers independently
please head over to the thread of that new addon to take a look at it, and state any futher questions about it there.