CAN NOT FIND THE DDS SETTINGS FOR GIMP TO CREATE DYNAMIC THEME|PS3 Themes|Forum|PS3 Themes

1) I OPEN GIMP
2)I CHOOSE A VIDEO CLIP IN MP4 FORMAT
3) SPLIT VIDEO INTO FRAMES
4)CLICK ON VIDEO RANGE AND SELECT THE START AND STOP POINT
5)CLICK ON LOOP AND SELECTION ONLY THEN CLICK OK
6)I CLICK ON VIDEO AND THEN CHOOSE FRAMES TO IMAGE
7)I REVERSE THE FRAMES TO LIST FROM (1-ETC)
8)THIS IS WHERE IM LOST ... DO I
a)Export file as gif file
b)Export files as jpeg file
c)Export files as dds file
9)Then after this step: Thanks for any help