Either way your going to have to unpack the file due to the leecher protection the author put in. Google the engine and youll see what I'm talking about, and from what I've seen so far its a pretty long and difficult process (at least for me that is). I'd just wait for MHS
CE by itself does some naughty stuff that AVs don't like so it usually is detected as harmful (when in reality it's not), it's no surprise that a UCE would be detected as harmful. That's why you have a firewall, a Trojan will attempt to connect to the internet and establish a connection usually to an IRC to establish a botnet.
Easiest way to tell, is if it adds itself to startup, or as a service, makes copies of itself, or won't let you shutdown.
Check your task processes for things that you don't know what they are.
Well you are right arunforce for see CE is usually detect as just a regular trojan but my UCE picks up a trojan backdoor something (name of threat in thread name). For example go download CE and then go download the UCE i got and scan them both with Online malware scan you will notice they have different threats found. I have heard anything with a backdoor you should risk it. So im really confused still.