No, but there is a work around
Add the blocks on the site home page, which allows you to set the Display anywhere and creates the block as a system level block
Then go to a course and modify that to show on any course main page -
the block will stay as a system level block (rather than having a specific course/category as its original location) and will now appear on course pages in the region and with the default weight it has been given
Edit: The other alternative although I dont think you can set specific weights, but you can set default regions/order, is to edit the default blocks on a page so that new courses have the blocks you want added - I believe you can do this in the site config.php.