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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5 w2 {2 F& C$ \; V) o8 u|______________________________________________________________________________| ( x/ f% m1 L0 C/ `4 W& F
| 32-bit value: Number of PICTs in the structure |
. A( D& P* s$ j' O% @: T|______________________________________________________________________________|
7 m2 R# J- T' f; @8 o" I6 Y% u| Array of 32-bit values, size (number of PICTs + 1): The absolute offsets of each PICT from the | / X) k' j$ L9 W
| beginning of the file. The last offset value is used to determine the size of the last PICT in the structure. 7 o0 p2 F) B$ |8 x
|______________________________________________________________________________| 2 \6 B) [1 Y, b( C
| Array of 32-bit values, size (number of PICTs): The duration (in milliseconds) associated with | 5 ^. s! F+ h& L/ N# A7 W0 `
| each PICT (for animations) |
# H, ` H: f% ?- V% i9 \" i" V|______________________________________________________________________________|
6 t, a. I, {6 c# \4 ?+ A6 C| variable length PICT data | * i- H0 c6 B. d+ W. }- d1 V
|______________________________________________________________________________| |