I am not a big Lisp routine user, or creator so I have a question for people. Has anyone ever made a routine that might help me with my massive .cal file raster import. I have approx 3000 cal files that I need to do a raster import into a new dwg file being named the same as the cal file. There are no hours estimated for this part of the job. We did not know we would receive cal files version dwg's.

I don't even know if this can be easily done by a lisp routine.

Not exactly a LISP job - you can use Excel or Notepad and prepare a script (e.g. for ScriptPro) with a list of all available .CAL files (e.g. as an output of the DIR command) and the respective _IMAGEATTACH commands.