How do I change the sounds/ringer/alerts on my phones for certain people in my contacts?

I receive a ton of calls each day. The majority of them I want to go to voicemail. However there are about 15 people I work with that I want to know when they are calling me, sending a text, or sending me an email. So I'd like to have an audible alert when these people contact me - and no alert when others call or email. How can I do this?

Go into the Notifications, and down toward the bottom, go to contacts, and you can set them there.
Also, you can use Bebuzz Pro in BB app World (paid app).

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