I don't think that's available in 7.0.2, I think it'll always run as a separate window (I could be wrong). I was under the impression you had to upgrade the client to at least v8.0.1 to get the docked SameTime widget (I have 8.0.2 and it kicks butt).
If you do upgrade, make sure you have at least 1GB of RAM - anything less and it'll run very poorly.