Installation for ACK!MUD 4.3.1 ( As located at silverbridge.org )
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1. In your Makefile, someplace above the main list of O_FILES,
   include the following:

#IMC2 - Comment out to disable IMC2 support
IMC = 1

   Then directly below the list of O_FILES, add the following:
   [Note: BSD users - put a period in front of the word ifdef, and in front of the word endif]

ifdef IMC
   O_FILES := imc.o $(O_FILES)
   C_FLAGS := $(C_FLAGS) -DIMC -DIMCACK
endif

2. Open ack.h and locate the following:

#ifndef DEC_STRFUNS_H
#include "strfuns.h"
#endif

#ifndef DEC_ACT_MOB_H
#include "act_mob.h"
#endif

   Directly below that, add the following:

#ifdef IMC
   #include "imc.h"
#endif

   Locate your pc_data struct,

   Add the following to the end of it:

#ifdef IMC
    IMC_CHARDATA *imcchardata;
#endif

3. Open interp.c and locate the following section:

if ( !check_social( ch, command, argument )

   Add the following condition to whatever series of ifchecks exist there:

#ifdef IMC
	&&   !imc_command_hook( ch, command, argument )
#endif

4. Open comm.c and locate the following in main() :

    if ( fCopyOver )
      abort_threshold = BOOT_DB_ABORT_THRESHOLD;
    boot_db( fCopyOver );
#ifndef WIN32
    init_alarm_handler();
#endif
    sprintf( log_buf, "ACK! MUD is ready on port %d.", port );
    log_string( log_buf );

   Add the following beneath that:

#ifdef IMC
    imc_startup( FALSE ); // FALSE arg, so the autoconnect setting can govern it.
#endif

   Then further down in main(), locate the following:

   close( control );

   Add the following beneath that:

#ifdef IMC
   imc_shutdown( FALSE );
#endif

   Then in game_loop_unix(), locate the following:

	/*
	 * Autonomous game motion.
	 */
	update_handler( );

   Directly ABOVE that, add the following:

#ifdef IMC
	imc_loop();
#endif

5. Open save.c and locate fread_char:

   In the case 'I': section, and right before the final break; add the follwing:

#ifdef IMC
           if( ( fMatch = imc_loadchar( ch, fp, word ) ) )
                break;
#endif

   Then in fwrite_char, locate:

    fprintf( fp, "End\n\n" );

   Directly ABOVE that, add:

#ifdef IMC
    imc_savechar( ch, fp );
#endif

   Then in load_char_obj(), locate the following:

     for ( cnt = 0; cnt < MAX_ALIASES; cnt++ )
     {
       ch->pcdata->alias_name[cnt]  = str_dup( "<none>" );
       ch->pcdata->alias[cnt]	    = str_dup( "<none>" );
     }

   Directly ABOVE that, add the following:

#ifdef IMC
    imc_initchar( ch );
#endif

6. Open db.c

   Locate free_char:

   Find the section that looks like this:

    if ( ch->pcdata != NULL )
    {
      PUT_FREE(ch->pcdata, pcd_free);
    }

   Make it read as so:

    if ( ch->pcdata != NULL )
    {
#ifdef IMC
	imc_freechardata( ch );
#endif
      PUT_FREE(ch->pcdata, pcd_free);
    }

7. For users of copyover/hotboot ONLY:

   Locate do_copyover, and just before the buffers for the execl call are
   allocated, add the following:

#ifdef IMC
   imc_shutdown( FALSE );
#endif

Return to the main IMC.txt file and continue where you left off.