Both parts have to use the same frame rate, so if you need one part to go slower, you'll have to create some extra frames. This is how the desc.txt file works:
320 480 15 Width, height, frame rate
p 1 0 foldername Play 1 time, then pause for 0 frames
p 2 30 otherfolder Play 2 times, pause 30 frames after each loop
p 0 0 andanother Play infinite times, no pause between loops
The "p" is a separator, because it actually ignores line feeds and carriage returns. You can name the folders whatever you want and use as many as you want, and you don't have to loop anything if you don't want to. Note that if your frame rate is "15", then for a 2-second pause you'd use "30" like I did in the example above. You don't have to use the width and height of the screen as your width and height. You can use smaller dimensions and it will fill the rest of the space with black, or you can use larger dimensions but it will crop to only show the center of the animation.
Always make sure your ZIP is created in "store" mode, meaning that it has no compression. And make sure you delete any hidden files inside the ZIP, like "Thumbs.db" from Windows or ".AppleDouble" from a Mac.
Hope this helps!
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