-The NVWillow.esp and the NVWillow.bsa go into your data folder.

-There are some loose folders. Put the Sound folder contents into your SoundVoice folder. When you are done with the sound folder installation your file path should look like this Data > Sound > Voice > NVWillow.esp (that is the sound folder named NVWillow.esp).

-Meshes and Textures folders are there so you can change her body to whatever you want:
The other folders are Meshes and Textures and should go into Meshes and Textures folders obviously. But, These folders control her body meshes and textures. You have complete control over that. I have given her the Type3 Cali Body with the Feminine Small Hands and Type3 textures. You can easily change her body type by changing the contents of those folders.

MOD RECOMMENDATION: Are you looking for another companion? If you're looking for another good companion to travel with you in the Mojave I strongly recommend you try: Wendy Gilbert Companion by RickerHK
http://www.newvegasnexus.com/downloads/file.php?id=43247
RickerHK is a very skilled and talented modder whom I respect a great deal. Willow and Wendy make a great team :)