Preview when overwriting

[Fraenze]

Hi everybody.

Look this: http://www.terra.es/personal/diegocg/kde/index.html

You'll see a dialog with previsualizations when overwrting image and music files. My Dapper KDE 3.5.5 can't do that.
What can I do to have this setting on my KDE? I know he's using a Kpart, but don't know which.

Thanks and excuse my poor English.