>
> CentOS 4.0 does not come with apt. Where did you get apt from?
>
It's not installed by default, but you can get it using yum
install apt.
I put the kde.repo file in /etc/yum.repos.d and it upgraded the
KDE packages through yum, and now they appear fine in synaptic. However,
there are some dependancies broken, that do not appear through yum in
SL nor apt-get in CentOS.