The only one way to do this is to change registry option ;)
Normal security - you can choose which file is opened with macros:
[HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Excel\Security]<br />
"Level"=dword:00000002<br />
High security - any file is opened with option: disable macros
[HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Excel\Security]<br />
"Level"=dword:00000004