Group file formats in Save a Copy... dialog box

Whenever I do a 'Save a Copy...' I only ever use PSD, PNG, TIFF or JPG. There are many formats in the "Save as type" pop-up menu, and it'd be lovely to be able to group them somehow, so I never inadvertently, for example, select JPS instead of JPG. That way, I could have my most commonly used formats at the top of the menu, then a divider line, and all the other formats (that I never use) below that. I'm sure I'm not alone in only ever using a few file formats.