@Rilian

you are in the correct folder, it should be SamsungLA.prf. The tag to change is <SamsungChaptering> and it should be near the top of the file:
Code:
<samsungchaptering duration="10"></samsungchaptering>
I believe you can change the "duration=" value for the default minutes, and you can paste in base64 (see post#2 above) jpeg data between the tag to add your own image.

cheers

Gus