Delivery In MPEG 2...???

Hi all,
So I have come to my tails end with trying to compress a video file for delivery. I have tried everything and still cant figure out what to do. So now I am here, at the mercy of all you're knowledge.

I have a 30min tv show which is 1920x1080 Pro Ress 422HQ 25fps

and the delivery specs are:

Codec: MPEG2
Frame size: 1920x1080 pixels
Aspect picture ratio (OAR): from 1.78:1, up to 2.35:1
Frame rate: 50i
Stream type: MPEG2 Video Stream (Main Profile @ High Level)
Field dominance (interlacing): Upper Field First
Bit rate: not less 50Mbit/s CBR
Chroma format: 4:2:2

I have tried compressor but the max bit rate I can achieve on there seems to be 40mbs. I am also having trouble converting 25p to 50i. I cant find the setting for that in compressor.

Any help on how to achieve this delivery format would be greatly appreciated guys.

Cheers,
Graeme

In the Cut!