graphicxtras.com > Fragments of Photoshop shapes / part of a work instead of the whole of the vector tutorial
You can use the full vector or you can remove the rest of the shape and use only a fragment of the Photoshop shape. This can be done via the direct selection tool or using the pathfinder exclude / subtract tools.
1) Select custom shape tool
2) Set to shape layer or path (top bar of Photoshop / control bar)
3) Go to the middle of the top bar (custom shapes options)
4) Select either 'add to shape area' or subtract from shape area option (depending on the design)
5) Select the subtract option to remove existing area from the shape (either use the same shape or perhaps circle or square)
Using fragments can be a great source for new PS vectors. It can also be saved as a new shape via the edit menu define custom shapes command.
The above Photoshop can be used as is (it is part of the shapes collection) but a fragment of the image can be used
The above was created by using the direct selection tool to select some parts of the earlier design and then delete key was pressed removing part of the design.
This was repeated with other points in the path. You can then define the shape as new Photoshop shape fragment.
By using them with the pathfinder (combine, subtract etc) or set functions, you can remove parts of the path leaving a part which in turn can be used to create new vector and defined as such as via the edit menu. Basic artworks can be used to fragment the artwork but you can also use the paths themselves to create ever more complex artworks