Read this in the kdenlive forums in answer to someone complaining that the KDE3 version of kdenlive is no longer supported and he/she could not run KDE4 on the current hardware.
I was not aware of the fact that this KDE4 ported program - and perhaps other applications as well- do not necessarily need running an KDE4 environment as a whole, but rather some KDE4 modules only and as such can be used in KDE3 as well.
(More or less analogue on running Gnome software in an KDE desktop environment I suppose).
The good news is, that you do not need to actually run KDE4 to use Kdenlive for KDE4. You do need some parts of KDE4 installed on your PC to compile and run it, but you do not need to run the entire KDE4 suite. If you have trouble building/obtaining the KDE4/qt4 version of Kdenlive, please consult http://en.wikibooks.org/wiki/Kdenlive/G
I do run Kdenlive 4, but do not run KDE4 myself. (I run KDE3, 3.5.9 as you to be more specific).
You may especially be interessted in the Kdenlive Builder Wizard, available at http://www.kde-apps.org/content/show.php?content=85826
. Disclaimer: I wrote the wizard, but I do stand behind it, and would be happy to try and help you resolve any issues you may have with it, and using it to build the KDE4 version of Kdenlive.
As far as I understand "You only need Kde4 dev environment installed" . Haven't tried this out yet, importantly to state that all versions of kdenlive (up to 0.7) are still development releases and not really stable so far. However it remains a promising video editor, unfortunately there are only two and occassionally three people working on this application.