How to embed a manifest file at compile time in Visual Studio 2010

I have a project with a manifest file with the following node:

 <requestedExecutionLevel  level="requireAdministrator" uiAccess="false" />

...meaning I want it to only run "as administrator" by default.

from searching around, to make this work I have two options:

1. "Embed" it.
2. deploy the manifest file with the exe, and name it YourProject.exe.manifest.

I've tried option 2, and when I run my app it doesn't ask for admin rights?

So, how do I do option 1 in VS2010? I've heard of mt.exe, but this is no good to me as it's done post build. I need the option to part of the solution and the project file itself.

So, how do I make this work? I'll be happy to do 2, but it doesn't seem to work?