Add *( as new binding for dired-mark-sexp, *t for dired-do-toggle.
(define-key dired-mode-map "\M-o" 'dired-omit-toggle)
(define-key dired-mode-map "\M-(" 'dired-mark-sexp)
+(define-key dired-mode-map "*(" 'dired-mark-sexp)
+(define-key dired-mode-map "*." 'dired-mark-extension)
(define-key dired-mode-map "\M-!" 'dired-smart-shell-command)
(define-key dired-mode-map "T" 'dired-do-toggle)
+(define-key dired-mode-map "*t" 'dired-do-toggle)
(define-key dired-mode-map "w" 'dired-copy-filename-as-kill)
(define-key dired-mode-map "\M-g" 'dired-goto-file)
(define-key dired-mode-map "\M-G" 'dired-goto-subdir)