file names

Is there a way that I can stop the Evo restarting the file numbering every time I fly/ change battery (I'm not sure what restarts it)? After a few days of flying I want to dump all my footage into one file on the Mac but I get loads of images and clips with the same file name (albeit spread...

I only shoot stills with my XSP and change the card after every flight just to be sure to have at least the shots safe which I took before going on to the next flight. However, when inserting the new card the files names start again with 1 - like MAX0001.dng. So coming back to the computer I...