Create a derivatives feature like what Thingiverse has to make it easier to link up related items.
person A creates a Poser figure
person B creates clothing for that figure
person C creates texture for that clothing
A derivatives feature should create a well organised parent/child relationship between these items, that the uploaders can specify that "this clothing is a child of Figure XYZ", or "this texture is a child of clothing xyz" etc.
When you go on the page for the Poser character, it has a list of derivative works for that figure, ie the clothing or skins. This makes it easier to see all available clothing for that figure.
Then when you go on the page for the clothing, the clothing has a list of derivatives, ie the textures for that clothing. The clothing should also have "this is a derivative of" link to the character that it is for.
This will make things much better organised and easier to find related items.