No, your hypervue is by default limited to 5 nodes, so you can not render your animation with more then 5 nodes unless you buy additional rendercow licenses. You can install rendercow on any machine, the cow itself will not ask for any serial or be bound to one.

Sidenote: Cow was down for server re-configuration, but now its up again, so everyone can stress it again.  =)

Vue content creator
www.renderarmy.com