Vector packs(sets) are used both by beginners and professional designers in their works.
Vector packs are not software or plugins that have to be independently installed; they will already be present in the application such as Adobe Illustrator.
It is not recommended to open them with Adobe Photoshop because that is a raster program: elements cannot be scaled and it will convert them to bitmap.
The CSH format files can also contain a selection of same theme designs such as floral, wings, insects, dinosaurs etc.
With CS6, vector pack CSH files can also be loaded as an extension into Photoshop, adding pre-built installation of the vector designs into the application.