de http://wiki.contribs.org/SME8.0_Contribs_QA#Setup

db yum_repositories set sme7contribs repository \
GPGCheck yes \
MirrorList http://distro.ibiblio.org/pub/linux/distributions/smeserver/mirrorlist/smecontribs-7 \
Name 'SME 7 - contribs' \
Visible no \
status disabled

signal-event yum-modify
yum clean all