@bmaczero
No, that command isn't in DBC.
@demonhill
What you could do is put black points throughout the picture and turn transparency on, that way it would kind of look transparent. An easy way to do this is to write some code to put dots randomly on the image the do a GET IMAGE to get the new one.
Another idea, though I haven't tested this one, is to use a bitmap. As I recall there is a bitmap fade command. What you could do is display the sprite, then basically make a bitmap of the screen, delete the sprite, and display the bitmap over everything else. Since the parts that shouldn't be transparent are still solid underneath the bitmap, they would show through and look completely solid. The Menu, however, would be transparent since the sprite was deleted.
Ever notice how in Microsoft word, the word "microsoft" is auto corrected to be "Microsoft" but "macintosh" just gets the dumb red underline?