title: RStudio and Microsoft R-Open
body: <p>I currently have R-statistics distribution working with RStudio.</p>
  
  <p>I want to install also the Microsoft R-Open version, but how do I get RStudio to 
  reference this MRO distribution and not the 'regular' R-statistics.</p>
  
  <p>I could not find any documentation on this either here on Stack Overflow or on RStudio's website.</p>