Hello all.
I put this together several days ago & got some help here, and in the end, wound up with a pretty accurate profile for the PMDG 747-400.
If you are interested in a 3rd party profile, that seems to be giving everyone a pretty good fuel reading & time reading, you may grab mine here:
http://home.comcast.net/~ls25/PMDG744.htm
Also, if you want to read some of the other pilots results, check them out here:
http://pmdg.forumsplace.com/message504.html
I am open to suggestions, so please feel free, but it seems to be fairly close to accurate, within about 8,000lbs of fuel over 5,000 miles of flight, and so far it has been to the positive side, & not to the out of gas side.
Thanks for checking this out.
Larry Stewart