Script to automatically make a new bookmark folder in Skim for each PDF and store every bookmark created in it's respective folder?

Skim by default makes every new bookmark in the bookmark menu for all the pdf's, even if I create a bookmark folder for the pdf manually, there is no way of making it save the bookmark in this folder automatically because in the save bookmark dialogue by default the Add To field will show Bookmarks Menu as the default location, which I have to manually change to the folder I created each time. So I was wondering if there is a applescript method of automating all this so, a bookmark folder will be automatically created when I save the first bookmark and every consequent bookmark will be automatically saved into this folder.