This nude mod replaces the the model for Ada Wong with a completely naked one, so in the scenes in RE4 where you can play mod Ada you will have no clothes at all. There is also a modified version that instead of naked Ada gives you ada female character wearing sexy bikini while killing zombies.
You can choose to install either the sexy bikini mod or the mod nude character for Ada. Have in mind that this nude patch affects only the scenes where you can play with the nude Ada Wong, so in others you will still be playing with the default character fully clothed.
There is also a file containing some savegames that you can use to go directly to a scene mod you play with Ada if you want to check out the mods immediately.
Its a great mod but the real problem is with the games shitty camera view, supposedly very hard ada alter along the lines of the previous Resident Evil games, you really cant nude a proper wong to see Ada wong in many angles as you would with the previous games.
There are wong good instructions on female anal masturbation videos to make the camera cheat engine work, only links to videos with inane talks and nude links to non-informative forum talks.
Makes my blood boil.