I tried to come up with a start for you

Code:
 
/listfolders .echo -q $findfile($mircdir,*,0,listfiles $nofile($1-)) | readfilelist
/listfiles {
  var %data = $replace($$1-,$chr(32),$chr(160))
  writeini listfiles.ini folders %data %data 
  echo -s $1-
}
/readfilelist {
  var %foldercount = $ini(listfiles.ini,folders,0)
  var %i = 1
  :Loop
  var %getfolder = $replace($ini(listfiles.ini,folders,%i),$chr(160),$chr(32))
  echo -a %getfolder has $findfile(%getfolder,*,0) Files
  inc %i
  if (%i <= %foldercount) { goto Loop }
}


you will note that using this will cause mIRC to "lock up" while it runs.
I have it set to just read the mIRC folder and that alone caused my mIRC to stall.