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.
. P2 y% J, |. H& [+ R( c6 x+ C# C# G
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/ s0 ~6 u- y/ i4 C! ^| 32-bit value: Number of PICTs in the structure | ) k9 I9 S7 \% c: w) k
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, }9 E: x- H/ p8 X| Array of 32-bit values, size (number of PICTs + 1): The absolute offsets of each PICT from the |
F4 z6 B- u+ q| 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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6 Y( t2 C& S8 m' v9 Z/ k0 i| Array of 32-bit values, size (number of PICTs): The duration (in milliseconds) associated with | 3 o) I8 H! w$ i% q+ p: u& J }5 l
| each PICT (for animations) | $ P7 o; W0 z. P/ e& I0 `" W$ X
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| variable length PICT data | 6 s; v, K( G! v2 P
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