change the default developement environment in Visual Studio 2008, 2010

How do I change the default developement environment in Visual Studio 2008, 2010?

answer:

Use the Import and Export Setting Wizard:

1. Choose Tools -> Import and Export Settings...
2. Select Reset All Settings and click Next
3. Select whether you would like to save the current settings and click Next
4. Select the settings you want to use and click Finish