0Unsolved: Decoding interlaced vc1 in Media Center x64

Whilst my MediaPC setup can decode just about everything thrown at it, I have had prob­lems decod­ing inter­laced VC1 con­tent.  The prob­lem is caused by the fail­ure of ffm­peg to sup­port inter­laced vc1.  Whilst there are oth­er codecs (e.g. cyber­link or arc­soft) these are cur­rently not avail­able as x64.  Cyber­link do have an x64 codec for h.264 and mpeg2, but I haven’t been able to get it to work with VC1 con­tent.  Hope­fully ffm­peg will fix inter­laced vc1 sup­port soon, but as its been on the to do list for over 2 years I’m not hold­ing my breath