Can I use SAPI 4 on Windows 7?

The problem with SAPI 5 is tha开发者_如何转开发t I can't find any free Portuguese (Brazilian) voices; plus, I need to distribute the speech engine along with my program, so the paid alternatives would be way too much expensive.

Is there any way that I can use and distribute the SAPI 4 engine and voices and make it work in Windows Vista and Windows 7?

SAPI4 works on Windows 7 and Vista. MS Agent, which depends on SAPI4, now is supported on Win 7. If you install MS Agent, SAPI4 should work.
http://support.microsoft.com/kb/969168