True Interlaced video with Nero Digital

I have not used NeroDigital's Recode2 for a while but from what I remember it's unable to generate pure interlaced MPEG-4 video streams from pure interlaced MPEG-2 video sources! Even if it's able to.... I'm not entirely sure whether there are any MPEG-4 direct-show filters that can correctly decode such streams. That said, I have been able to generate pure interlaced MPEG-4 video streams using XviD and decode them in a hardware stand-alone player connected to a TV ;)

will any program create an interlaced MP4? 

I found this thread after trying to create an interlaced MP4 (ASP) with Recode 3, not possible. Handbrake has no control over mpeg4 options, and cannot enable B-frames. Is there anything else?