Placing registration marks on the corners of document

I have to process a lot of files to be router trimmed which requires them to have very specific registration marks.  There are 2 different marks we have to use.  The first mark is at the top left corner of the image contains 2 .25" dots separated vertically by a 1" gap.  The other mark is one .25" mark that is in the top right, bottom right, and bottom left corners.  I have both of these registration marks saved as symbols (or just AI files).  I want to be able to have the script automatically place the appropriate marks in the corners.  How can this be done?

Thanks!

Chris