In reply to simondgee:
Perhaps someone else can create a self-contained script to do this. Shouldn't be too hard.
From the wishlist page (or a logbook page or whatever), find all the elements with the class "climb". The link text gives the climb name and the link address gives the climb id.
Then on the edit ticklist page, you need to repeatedly execute the JavaScript function addClimb(id,name) for each of them.