I was wondering if by replacing just one of my regular 3-way wall switch (in a room where there are 2 wall switches controlling the same light)with a X-10 3 way switch, will I able able to control the light remotely with the 4040 X-10 controller?

I thought I heard somewhere that a master and a slave switches are needed. If that's the case, does a 3-way X-10 wall switch set contain both the master and slave switches?