I have 2 drives 1 with win7 ultimate and the #2 drivehas win server r2 I would like to setup a dual boot do I need to reinstall the OS or is this something I can do on the fly with no reinstall?

You can use Microsoft's bcdedit. Check the links @ http://search.microsoft.com/results.aspx?form=MSHOME&mkt=en-us&setlang=en-us&q=bcdedit There is also EasyBCD from NeoSmart: http://neosmart.net/dl.php?id=1 Either on will let you set up a dual boot menu with your current installation. You will need to read on which ever method you elect to use for full instructions and options.Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.