No problem. Yes, you hook the first one up, read it (click the read button), it's a good idea to save a copy of the codeplug at this point (File -> Save As), make sure everything is programmed how you want it and then hook up the second radio (after detaching the first of course) and then clone.
Again, as long as the two radios have the exact same model number (as read off the tag on the back of the radio under the battery) you should be able to clone. Otherwise, it'll give you an error and you'll have to then program everything by hand.