QtMultimedia module in QT 4.5

[vijay_kansal]

I have qt 4.5 installed on my ubuntu OS.
and as per my knowledge QtMultimedia module comes with versions after 4.6
So. how can i use it on my qt 4.5

As a solution to this , how can i upgrade to qt 4.7.1.
Also, does it (qt 4.7.1) at least offers the QtMultimedia functionality as offered by QT 4.6