Whenever you install Business Portal , most of the people will get error in MbfPackager.exe. Main cause of this problem is read/write permission to the folder.
If you get this error then you give the full access to "C:\intepub\wwwroot\". One more thing you run the business portal set up using "Run as Administrator" mode.
The above two methods solved my BP Installation Issue.
I hope this will help to all.