PFF stands for "PICT Flick File." It's a custom format HyperBole Studios developed for storing animations, somewhat similar to GIF files. PICTs are Apple-format images (see http://en.wikipedia.org/wiki/PICT). Here's some documentation that describes the format of PFF files.
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7 u) Y4 H9 E9 ^9 S/ h| 32-bit value: Number of PICTs in the structure |
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' ~( x9 T/ G% D2 v| Array of 32-bit values, size (number of PICTs + 1): The absolute offsets of each PICT from the | 7 ]7 x2 o2 H" S& [" P! n) Z
| beginning of the file. The last offset value is used to determine the size of the last PICT in the structure.
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| Array of 32-bit values, size (number of PICTs): The duration (in milliseconds) associated with | 9 a3 X7 v6 i; S% P
| each PICT (for animations) | # U+ O* r6 F0 z! ~% K {
|______________________________________________________________________________| . d# t) t& v7 }1 [& O! R1 t+ t
| variable length PICT data | 2 c, J0 k6 u9 c2 b+ U( }3 t
|______________________________________________________________________________| |