I did have Font figured out but lost the docs.. Bits in AO is very simple in AE in has a small 1kb or so hard coded table that is then decompressed or something into a much bigger 8kb table. This table is then used to decompress each segment of the cam file. After this something else is done to the segment in some recursive complex function that extracts the RGB values
Anim isn't too hard but i lost the docs on that too, I'll get it back eventually so don't worry about it
Path has a hard coded offset for every path id to where the "real" data starts. It appears that each chunk of data is an offset into an array of function pointers (possibly a class VTable) and also some arguments to go to that given function. I managed to replace a slig with a mud from changing the values at run time with the debugger.
Also I can't see your FG1 docs yet
Hopefully they are the same as the AO versions.