Slackel is a live system based on Slackware and usually ships in Openbox and KDE editions. Today the Slackel crew announced their latest, Slackel Live KDE-4.10.4. "A collection of two KDE live iso images are immediately available that can be burned to a DVD or used with a USB drive."
Slackel KDE-4.10.4 Live is based on the current tree of Slackware and features Linux 3.9.5, KDE 4.10.4, Xorg X Server 1.13.4, GCC 4.8.1, and Firefox 21.0. It also includes lots of other software like Clementine, VLC, and the Calligra office suite too, as well as a long list of configuration tools. I didn't see one for installing proprietary graphic though (although, that doesn't guarantee it doesn't exist). So assuming it's really not there, it looks like we may have to install them the old-fashioned way because Slackel uses nouveau for NVIDIA chips by default.