split A/C - two indoor units? Heat pump?

Hi all,

after spending the afternoon alternately trying to work on my truck in 
the driveway and running inside to bask in the A/C and rub alcohol on 
the skeeter bites to cool them off, I'm thinking that A/C in my garage 
would be oh so nice.  A friend recommended a two piece unit but I am not 
seeing exactly what I'd like from a quick google search.  I'm thinking 
it would be nice to be able to have two indoor units, one upstairs and 
one downstairs, and also if either/both could function as a heat pump 
that would be great, because there's no heat out there either.  Is there 
anything on the market that fits my needs?

thanks

nate
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