Well i think that you need the jap DOA 2 LE edition, however i have heard that if you set your age to something like 99 in the usa edition you get a cloned character neked in the video bit. After a quick search with google, it appears the uk version also had some kinda nude version as well.
Anyways you need either the gameshark or the action replay, then
Enter the gameshark code:
39896AAF
00000005
Now, Choose Tag Mode & Pick anyone except Kasumi for your first fighter, now pick Kasumi for the second fighter.
And heres a url that you might like:
http://doa.tenkoku.com/Tricks/Tricks.htm