Just interested to find out what editing application you use instead of Storyteller.
I've very new to video editing and have found the Storyteller application doesn't do very much anyway.
I'm using Windows Live Movie Maker at the moment once I'd used Storyteller to get the files off the camera.
The simplest free editor for mov files is mpeg streamclip - you can do simple cuts, trimming and file joining without losing the gps data embedded in the video. Quicktime Pro will also do this.
Suppose you want to join file B to File A. Open File B first, then menu Edit/copy. Close File B, Open File A. Menu Edit/go to end/Paste. Wait a few seconds for complete video to appear then use File/Save As. A progress bar will pop up and appear to do nothing for minutes until seconds from the end of the process.
Do NOT use the File/export commands as these will re-render the video and the GPS data will be lost. The Save As option preserves the original picture quality and data - it just redoes all the time codes etc for the joined file. You can also use the Save As command to trim a single file
I use Dashware for mp4 production with overlaid speed, distance and the like. It's a bit quirky and joined files with time gaps will cause issues with speeds that need some careful sorting out to get right.
John