Office installation failed on Mountain Lion

Hello,
I´m running UniBeast- Mountain Lion 1.7.0 on a OS X 10.8.3 and trying to install Office but it gives me the following error message “The installation failed”. I have tried many times to fix this problem but I can’t do anything without your help so suggest me the better way to resolve this issue. Thanks.

The installer encountered an error that caused the installation to fail. Contact the software manufacture for assistance.
