OK

To tell the truth I'd be glad if there would be only one standard for all the handsets. Or if there would be only one type of handsets :) but those quirky owners... they just buy that other...

thx

The main problem is still that 'proprietary'

For COD see the Nokia Content Publishing Toolkit. As I know its a proprietary DRM.

It could be the same way that browsers handle dynamically created streams.
Try to add this HTTP header:

Content-disposition: attachment; filename=yourfilename