AMSMAN, if you fly in Microsoft Flight Simulator 2000 and above, you can find reference data for the included aircraft using the kneeboard. This is especially helpful because the aircraft in the simulator are modified for simulation and may be easier to fly if you use the MS
reference speeds instead of the actual aircraft speeds. If you're looking to see how simulation speeds compare to actual speeds, the link above is one good reference.
Dusting off my personal copy of FS2004, I found the following:
B737-400 Vref (Flaps 30, Gear down)
147 KIAS (136,400 lbs)
144 KIAS (132,000 lbs)
B747-400 Vref (Gear down)
188 KIAS (880,000 lbs, Flaps 25)
181 KIAS (880,000 lbs, Flaps 30)
134 KIAS (450,000 lbs, Flaps 25)
125 KIAS (450,000 lbs, Flaps 30)
B777-300 Vref (Flaps 30, Gear down)
157 KIAS (580,000 lbs)
It's interesting to see how that compares to the real-world Vref speeds. Hope this is helpful.