If rpmbuild succeeds, it created a rpm file in one of the subdirectories of $HOME/rpmbuild/RPMS/ (check in the last lines from the log of rpmbuild). To install this rpm file, use
Code:
yum install /home/jojojojo/rpmbuild/RPMS/x86_64/auto-multiple-choice-1.0.4-1.fc16.x86_64.rpm
as root (in my case, the user is jojojojo and the architecture is x86_64)