This is one of multiple videos showing you how to install and configure GNS3 2.1 on Windows. This video discusses various misunderstandings people have about GNS3 and best practices for using GNS3 today.

Questions answered:
1) Does GNS3 support switching
2) Do I need to use Dynamips with GNS3
3) Can I use VIRL images with GNS3