Hmmm, from the top:
1) cjpeg are library routines to compress an image file into a jpeg format
2) djped are library routines to decompress a jpeg into a regular image file
3) PBM is the standard for 'portable bitmaps'
This whole suit of tools, you are asking for, is an absolute monster in size...
#1 and 2 are installed in the server core
#3 is not
I will have to evaluate if I will include #3 at a later date... If I do implement it in the core then I will have to label it a 'non-support' item meaning the tools are there, but no FQuest official support in relation to them will be handled...
In short: they are there to use at your own risk...
--Constantly battling with the argument of sheer capability and flexibility versus server performance and stability--