I tried every alternative available
I have to insist that the Avr Studio 5 does not use avr-gcc but their own compiler.
Only 1 slight problem... If you don't have the latest and greatest in computers, then Visual Studio 2010 takes all day to get anything done. It is another piece of Microsoft bloatware.(for the record - I am a VB6 and Visual Studio 2000 user) I tried running VS 2010, and AVR Studio 5 and found them both to be agonizingly slow. Visual Studio 2008 isn't much better.