Cannot install kde3

I am running Kubuntu Lucid. I added "deb http://ppa.launchpad.net/kde3- maintainers/ppa/ubuntu lucid main" to my sources, updated and ran "apt- get install kubuntu-desktop-kde3". However, it would not install:

kdelibs4c2a-kde3: Depends: kdelibs-data-kde3 (> 4:3.5.12) but it is not going to be installed Depends: kdelibs-data-kde3 (< 4:3.5.13) but it is not going to be installed

So, I tried installing kdelibs-data-kde3 but, again, nogo:

dpkg: error processing /var/cache/apt/archives/kdelibs-data-kde3_4%3a3.5.12-0ubuntu6+r1152788_all.deb (--unpack): trying to overwrite '/etc/kde3/ksslcalist', which is also in package kdelibs-data 4:3.5.10.dfsg.1-3ubuntu2

Any advice appreciated.