Open two instances of a file in a single Visual Studio session

Question

I have a file, xyz.cpp. I want to open two instances of this file in Visual studio (BTW, I am using Visual Studio 2005). Why would I want to do so? I want

Answer 1

I don't have a copy of Visual Studio 2005, but this process works on Visual Studio 2008:

1. Open xyz.cpp along with some other file.
2. Right click on tab header and select new vertical tab group.
3. Left click on that other file in the first tab group.
4. Open xyz.cpp through solution explorer again.

You should now have two instances of file in separate vertical tab groups.