I have ported my old script for kdenlive 0.7 i would like know if it works or not for you :)
i am doing a gui with kdialog.
http://www.cli-apps.org/content/show.php/akw+(Automatic+Kdenlive+wesley+producer)?content=102619
here the version 0.3 + service menu for dolphin
http://www.kde-apps.org/content/show.php/akw-qt?content=104980
if someone is interested to use zenity there is always the akw script , for that you don't need of kdialog.

updated version...
now you have only to use
awk T1 T2 PAL 1
t1= time for picture
T2= time for transition
PAL|NTSC
1 aspect ratio.