We found some machines that do not show the "Attach To Process" option.
This is very important for us, specially if you are testing the migration of an VB6 ActiveX EXE or ActiveX DLL to C#.
There is a bug reported by Microsoft http://support.microsoft.com/kb/929664
Just follow the Tool/Import Settings wizard to the end. Close and restart VS and the options will reapper.
Also you might find that the Configuration Manager is not available to switch between Release and Build for example.
To fix this problem just go to Tools -> Options -> Projects and Solutions -> General... make sure the option "Show advanced build configurations" is checked.