Using Elements only, there’s no way to automate this. What you’re referring to is the ability to run an "action", and there is an addon available that will allow Elements to run actions, but you can’t create them. That has to be done using a full version of Photoshop. If you know someone who has the full version and could create the action for you, it might be worthwhile to get more information about the extra tool. If you don’t have access to full PS, though, you’ll have to work on each image individually. (Of course if you had access to full PS, you could just add the filter from there in the first place!)
S Mark, Providing it’s only one filter and set of filter settings you could apply the filter to one image. For next images, press control F…can do more than once per image. The big draw back is only one filter and set of settings is stored so if you use another filter that filter and it’s settings will be applied to subsequent images when control F is used. Unfortunately, you will still have to open the individual files.
Terri