no, I was not, but now I tried as root:
Last login: Sun Jun 17 12:47:41 2012
[root@sme80 ~]# db yum_repositories set sme7contribs repository
[root@sme80 ~]# GPGCheck yes
-bash: GPGCheck: command not found
[root@sme80 ~]# MirrorList
http://distro.ibiblio.org/pub/linux/distributions/smeserver/mirrorlist/smecontribs-7-bash: MirrorList: command not found
[root@sme80 ~]# Name 'SME 7 - contribs'
-bash: Name: command not found
[root@sme80 ~]# Visible no
-bash: Visible: command not found
[root@sme80 ~]# status disabled