In 2008, there’s an option in the First Launch dialog to bring over your Visual Studio 2005 settings. 

First launch dialog

If you had Visual Studio 2005 previously installed, you’ll still have your Visual Studio 2005 settings in your Documents folder.  This includes your auto-save current settings file from 2005. 

The first launch detects this and gives you an option to choose this file as My Previous Settings.  VS will reset as much as applicable, depending on how different your installs of VS 2005 and VS 2008 are.

Technorati Tags: VS2008Tip