Batch changes to courses - e.g. Branding Image

Summary:

I would like to make batch changes to courses - e.g. changing the same attribute on multiple courses at once. This could be category, or in this case, branding image.

Content (required):

I'm coming from another LMS (CSoD) which allows around half of the fields on each course, to have batch changes made against them. This saves a huge amount of time. As it stands, I've got a backlog of 550 items I need to go into, and assign the same cover-art image against.

I suspect there must be some means of doing this via HDL (I don't have access to this area) but does that include cover art too?