Something

urpmi.addmedia --update contrib_updates ftp://carroll.cac.psu.edu/pub/linux/distributions/mandrivalinux/official/2007.0/i586/media/contrib/updates with media_info/hdlist.cz
added medium contrib_updates
wrote config file [/etc/urpmi/urpmi.cfg]
examining synthesis file [/var/lib/urpmi/synthesis.hdlist.plf-nonfree.cz]
retrieving source hdlist (or synthesis) of "contrib_updates"...
    ftp://carroll.cac.psu.edu/pub/linux/distributions/mandrivalinux/official/2007.0/i586/media/contrib/updates/media_info/hdlist.cz