For fun and to see how FS2 compares to real life especially with the new Colorado scenery, try flying this same winter landing from the North into Aspen on youtube
(it's called "Gulfstream V Landing in Aspen Feb 2017" )
Here are the lines for main.mcf to change to start at nearly the same position - I recommend using the LearJet and try to maintain about 125 to 130 knots:
<[tmsettings_flight][flight_setting][]
<[vector3_float64][position][-1435396.5157948 -4716246.80321949 4040404.9207086]>
<[vector3_float64][velocity][26.8269079828711 -60.5573456164099 -68.6142902163726]>
<[matrix3_float64][orientation][0.281191845740816 -0.66685860418673 -0.690094738359162 0.923427692175682 -0.00768661804935444 0.383695469384324 -0.261175119818038 -0.745144628864149 0.613634287554846]>
<[float64][gear][1]>
<[float64][throttle][0.333318074311437]>
<[float64][flaps][0.666666666666667]>
<[flight_configuration][configuration][Keep]>
>
I realize that IPACS doesn't want you to edit your main.mcf unless you are careful (I use Notepad++) and back the original one up. Personally, I really live on the edge and once I find a main.mcf initial condition that I like, I exit FS2 and copy it so I can rerun that same setting later - but that is thought to be a no-no by IPACS since the format of the main.mcf can change with the next update of FS2 and the saved version would then be out of date. The above lines are really the only ones to set. If you have more than one monitor (I've got three), run the video from youtube at full screen on one and simultaneously run FS2 on another. The only difference is that it is winter!
Dave W.