Learning Swedish in 3 months

Hi, I'm going to Sweden for 3 months on a student exchange.  I'm a native English speaker.  How possible would it be to learn Swedish during this time abroad immersed in the language?

I have 3 and a half months before I'm in Sweden.  So I could start learning now.  However I have no idea where to begin.  I have two ebooks, "Colloquial Swedish" and "Swedish: An essential grammar".  I don't have any audio CD's.  I've read around, and language learners seem to praise Assimil, however I can't find the Swedish version anywhere.