If it is an independent file, insert the picture into the report, then right click and choose Format Picture, click on the the Picture tab, click on the x+2 next to Graphic Location and type in the location of your picture. to make the picture dynamic I would type something like:
"P:\Files for Reports\Pictures\"&{PART.ID1}&".jpg"
now for each part it will display the image from that directory which corresponds to the part's ID1.