ok wall of text time.
download the lrs zip linked earlier (version 5.19)
inside that zip is a folder called doa++.0.3.9
inside that folder is devenum.dll.
drag the devenum.dll into the dead or alive 5 folder, it will overwrite the old one that came with beach paradise.
exit steam if its running, because we are using a cracked steam dll to unlock the full game.
start DOA5 using the 3dm launcher exe
you'll know if you did it right because otherwise the outdated devenum would throw an "unknown exe" error when you launch the game.
if its instaled correctly, you should see some text on the title screen at the bottom right, showing the exe and autolink versions.
start any game mode and you should see a bunch of swimsuits instead of the regular costumes when you scroll down past the first 12 or so.
from the games main menu, go to extras/movies and hit left bumper on your contoller, or U on the keyboard to find the private paradise movies.