side-by-side migration sql 2008 to sql 2012

Hello,

I plan to make an side-by-side migration from version 2008 to version 2012 on the same server-hardware.

Planned steps:

1. On the server with the running SQL 2008 (as a default instance) I install a named instance of SQL 2012

2. Then I migrate the databases and other objects to the new SQL 2012

3. When the migration works --> uninstall SQL 2008

Now comes my question: What´s the best way to make my named instance to the default instance?

Thanks for your help

Hubert