The new TU-144 Package, by michael roberts, uploaded on Jan 7 - 2012 - does NOT Fly in FSX !  Designer "claims" he's reworked it for FSX from FS 2004 - if so, the airfile is wrong or the flight dynamics in the aircraft cfg file is all wrong !!!  this is by far NOT up to FSX Standards by any means !  I use FSX Gold Acceleration edition - also many of the guages and panel don't show up , and some of the TU-144's have sound and others don't !!!  hardly what I'd call reworked for FSX - nice try tho