Just a suggestion, but if you aren't married to the Rosetta Stone program, you might want to consider Fluenz. It was recommended to me just last week by a fellow diver. He claimed that it really worked for him, much better than Rosetta Stone.
Here's a website commentary that I just happened to pull up (I'm not related to it or married to it or anything, it just popped up on my search for Fluenz)
http://www.learnspanishrapidly.com/...enz-spanish-comparing-the-best-programs/