Resources
Workshops and developer files
Great that you want to create your own stuff for the sims or just looking for some cool resources to fool around with.
This is what's actually online:
Linda's milkshape 3D workshop
See and learn how Linda's body mesh was created. Use this information for your own meshes.
Well-Shaped-Male
The original 3D obj-files of a well shaped penis. Use for everything you like.
Nude Skin Developer
A pretty nice psd file (photoshop) you can use to create Nude Skins that fit on the well-shaped mesh.