Can I pulse hazard lights w/ keyless 4BMW

Hi,

I have a 2002 BMW 325i.  I would like to make the hazard lights and/or horn pulse when the keyless remote (standard remote that came with car) is used to open or close the doors.

Can someone provide me a diagram of how to do it, which wires to tap into and  where they are located.

Thanks in advance

Hedess

I know how to do it with a aftermarket keyless but don't know how to extract the lock and unlock signals from a factory intergrated system.