How to install the virture print backend automaticly when installation

[xianyu.ge]

> Just copy your backend to
> Linux OS: /usr/lib/cups/backend
> Macintosh: /usr/libexec/cups/backend
>
> Then you can start to use it.
>
> > How to install the virture print backend automaticly when installation?
> > I have a virture print backend that used with cups, I want it installed automaticly when installation, Anyone would hlep me will appriciate it!
>
 Sorry for my ambiguous sentence, I just to want to know how to add print such as use "System Preferences", and click the "add print "button, I would like to implement it use codes or script, please point me, any advance is appreciate.