Thanks Tyson...yeah feeling gr8 to get the plugged on cgtalk..hehe..
Franklyn :: yeah it's totally rendered first as 3d like u said assigning matte.u can see it in my breakdowns.
i mapped final render on plane in 3ds max to do some camera faking as u can see that i have still image as background and if i won't so any camera movement then it will become boring.(still shot)
but i felt that it's overdone..and rotated camera little much.
also i did DOF faking..
check out attachment file..i used mixmap to fake animated DOF for background.
link to file ::
http://www.filelodge.com/files/hdd6/134 ... ra_DOF.zip