This may not help, but in cacko, when using kino2, there is an option to save your playlist under the "File" menu.
It gives you a choice where to save your playlist, by opening a file save dialog, with Internal disk, SD card, and CF card.
(That is if you have both cards inserted).
This is on my C3100.
I just save mine in the same directory where my movie files are.
/hdd3/Documents/Movie_Files
I only have 3 movies in there at the moment.
I don't use kino2 that often, but I also have these checkmarked in prefrences->playlist
x Save current playlist
x Save current position in playlist
x Add file to playlist on tap when opening