After installing CEL, the easiest way to fix the errors PS gave was to run configure with whatever flags (.--enable-new-renderer && || --enable-debug)
Edit config.status once configure has finished, change /usr/local/cel/include to /usr/local/include/cel, re-run config.status and jam away.


I was getting re-def errors..
/usr/local/include/cel/physicallayer/pl.h:41: error: redefinition of `const
   size_t csArrayItemNotFound\'
/usr/local/include/crystalspace/csutil/array.h:305: error: `const size_t
   csArrayItemNotFound\' previously defined here

My problems were due to not having _the latest_ cel package. fixed with cvs.