Is there an easy way to group new filenames?

I'm dropping a lot of mp3s into the renamer and there is usually album cover jpgs mixed in.
I figured out that if I add a column for Dimensions and then click it, it will group all my pictures at the top, making it easy to select and remove them from the batch.

In relation to this I've noticed that before I start the batch the New Filename column will show in black the files that will change and in grey the ones that will not change.

What I'm wondering is- if there is some way that I can easily group the files that will have a new filename? I want to be able to quickly and easily remove everything else that won't be changed and work only with what will be changed.

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