Hove to watch movies in P990?

I can watch at short peaces of a movie, but when I compress a DVD for the phone an play it, the screen became white, or black. It a different between the formats I have used.

I have tried mpg4 and 3ggp, and some other formats I later understand the phone cud not handle.

So I wonder hove to do? Is there a special need of a fast memory stick? (The one I use is scandisk Memory stick pro duo 4gb)

If this don’t work at the moment, cud you please tell me when it’s possible, and tell me if its never going to bee possible.