Package rpm-libs needs rpm = 4.2.3-13.WB2, this is not available.
do "rpm -qa | grep ^rpm" see what rpm-related packages you have installed and redownload them and instal them from centos3.
possibly also run "rpm -qa | grep -i WB" and reinstall all WB specific packages to (hopefully) get rid of such problems in the future...
Cheers, MaZe.