From urpmi.cfg
(...)
contrib2007 ftp://mirrors.usc.edu/pub/linux/distributions/mandrakelinux/devel/2007.0/i586/media/contrib/release
(...)
contrib_testing ftp://mirrors.usc.edu/pub/linux/distributions/mandrakelinux/devel/2007.0/i586/media/contrib/testing

[root@localhost ~]#  urpmi  soya
Some requested packages cannot be installed:
editobj-0.5.7-1mdv2007.0.noarch (due to unsatisfied tkinter)
soya-0.12-6mdv2007.0.i586 (due to missing editobj-0.5.7-1mdv2007.0.noarch)
Continue installation anyway? (Y/n) y
[root@localhost ~]#