Plot stamps

I need to show the file location on a SW plot.  This is something at our work we do all the time.  Autocad has no problem doing this at all.  I understand I can do a annotation and link it to a property.  If I choose folder name or file name it just shows the name.  How can I get SW to show the whole file path?  Do I have to create some sort of custom property?  Now I just copy the path and paste it into my drawing.  Is there a better way to do this?

SolidworksGeneral