Add maintenance operations?

Hello,

Just wondering if there's a way to add some commands to the maintenance operations. I'd like to add the following commands to quickly fix bad upload/resizing:

"

UPDATE gal_items SET thumb_dirty = CASE
WHEN thumb_height >200 THEN 1
END

UPDATE gal_items SET resize_dirty = CASE
WHEN resize_height >700 THEN 1
END

UPDATE gal_items SET thumb_dirty = CASE
WHEN thumb_height IS NULL THEN 1
END

UPDATE gal_items SET resize_dirty = CASE
WHEN resize_height IS NULL THEN 1
END

"

As a feature it would be great if the "200" would just relate to the default thumb_height field and "700" would relate to the default resize_height field.

Is there a way to add this to the current maintenance operations?

Thanks!