Ah, I was wondering when this was coming. Unfortunately, this is the only mission of its type. Mojo has some information that could be useful to Tanner, but some gangsters just kidnapped him and want $10,000 to release him, and they are the most impatient gangsters I have ever met. All you have got to do is get to 3 phone booths. Look at the map and plan your route first. Once you've done that just rush to each phone box. Once you reach the last one they hang up on you and force the 10 grand out of you. This may have strict timing but it is really easy after a few goes. If you fail the first time, the second time you'll do better until you get within the time limit.