Adding to Existing Domain

[culhwch1066]

So....the SRD has the Life domain, but not one of the spells that the domain gets? Grrrr....

After I've created the spell in the editor, how would I go about adding it to the domain's list of spells? I suppose the easiest way would be to just create my own copy of the life domain...but that'd give me two copies of the domain (unless there's a we to delete the built in one).