Spacecraft Rendezvous from State Vector

[pbhuter]

I have a state vector (position and velocity) of a spacecraft and a position I want to get it to for rendezvous with another spacecraft (just position). I also have a time, t, of transfer. I need to calculate the delta-v (Vx, Vy, Vz) to get from position A (with velocity Vx, Vy, Vz) to position B, in time t. I can do Lambert targeting or Hohmann transfer using orbital elements, but I'm not sure how to solve my current problem.