You are almost ready to run IMDI.

1) request the package;
2) unpack it in your working directory;
3) create a file "mos.dat" appropriate for your version of IDL. Under Unix, create a link   ln -s mos_54.dat mos.dat if you run IMDI under IDL version 5.4. Under Windows, just copy (for instance) mos_54.dat to "mos.dat".
4) Type "idl mos" to start IMDI.

Please request the most recent version of the IMDI executable code for IDL 5.2, IDL 5.3, IDL 5.4 to the DOLoRes Staff Astronomer.