If you have specified an email address for the Organisation record then as long as you refrence "organisation" in the "send to" box it will go to that organisation record (ie the one specified in that SR).
If you specify "Child Organisation" in the "send to" box it will go to the child organisation record(s) (all children, I think).
Thanks guys, I'm still not sure what to do. I am only interested in sending emails to ONE parent org and its children, not every org, I have created a rule to send to orgs that begin with certain letters ex. xyz___ but I still think there is a better way to define "child Org" I do not see it as a choice which brings me to tell you I am on OVSD 4.5 w/ sp9 so maybe this is why I don't see "child org" as a choice??? Thanks