The company I flew with used the following procedure ( I flew 727-200, however, not the 737s ). Most real traffic will be slowed by ATC to about 220K in the terminal area to facilitate separation. For the simulator it would be most realistic to make sure you are level at 10,000 and below 250K before 35+ miles from touchdown. On downwind keep AS at around 210K max; when on crosswind: 190K and when cleared for approach: 180K until intercepting final course. Depending on weight you would want to be extending flaps per schedule (visible on AS tape). After intercepting final course immediately set target speed to 170K and flaps=10 (15 for high landing weights). On G/S active (at least by 2 mark) extend gear and slow to 160K and add another degree of flaps. On GS intercept (or final approach fix on nonprecisions) slow to Vref+5 if autoland (Vref+ 1/2 headwind if only autocoupled or manual) then extend final flaps (30 if light/40 if heavy). When landing is assured, begin slowing to cross threshold at Vref (plus any gust factor). I generally try to calculate my fuel so that the flap setting I need to use will bring my Vref very close to or less than 140K. Use a very slight flare or the NGX will float and not settle. For FSX this mirrors very closely the real procedures one would fly if ATC ( or the published procedure) didn't have special speed restrictions (for example, often times certain turns require an early slowdown to assure that the aircraft will remain in a given protective area, etc.) If at any stage, you find yourself too high or too fast then using speed brake (do not use for flaps over 15, however) momentarily should bring you back in line. Hope this helps. Craig

Put a speed restriction of 225/10000 in the DES page. Works for me every time. Guthrie Z

Sometimes your flight plan will show an altitude like /5000A (5000 feet or more) too close to the airport. In this case, the FMC will warn you that the course is not achievable and turn off the VNAV button. What I do in this case is replace the "/5000A" by "/5000B" (below 5000 ft) in the FMC, and press the VNAV button to turn it on. If I did it early enough, the plane will drop low enough to achieve a VNAV landing all the way down. Henri PS: for the slippery NGX, it is not a bad idea to use a "4 times the altitude" rule instead of the 3x rule to figure out when you should start descending, for example at 30,000 ft, start your descent at 120 miles away from the runway.