You can include Active X controls onto the front panel of LabVIEW, which the user can see. With Active X, you can embed a movie (AVI, MOV). I am not sure about Real player files though. If Director has ActiveX controls, you may be able to use it from LabVIEW's front panel.
For sounds, you can open and play wave files.
As far as images, there are .bmp, .jpg and .png support. You'll need the Full or Professional Development System in order to utilize this.
Hope that helps.
Shan Pin Koh