Depends what avatars you're using. If you use avatars like DAZ or Poser avatars, you can buy many types of shoes for them in the DAZ/Poser marketplace...

Texturing Marvelous Designer clothes is very easy. Camille Kleinman made several free texturing tutorials which you can watch on her youtube channel:

@Arturo In that case you'll need to create fake buttons in MD and apply a button texture.

the steam tool is useless.