If you use the INT-BMW2 install guide and the EVO-ALL install guide, all required connections are pointed out. I'd recommend not bothering with datalink connections if you are not familiar with it; all the dotted lines in INT-BMW guide should be connected to appropriate wires of the VIper system. I'd recommend looknig at the EVO-ALL only install guide also because it indicates 2 or 3 more wires you should connect from the EVO to the Viper system, such as trunk status.
In short, there will not be many connections made from the Viper system to the vehicle besides for 12V, Ground, Parking Lights and installing the Siren.
As a little warning, If connections at the brake are not properly done, you will blow the brake switch.