The following is a walkthru on how to utilize the ILS (Instrument 
Landing System) featured at some Microsoft Flight Simulator airports. 
This walkthru was composed by Jeff Horrocks 72247,1462 on November 11, 
1989.

Our flight today will be from San Francisco International's runway 10L 
(SFO) to San Jose International's runway 12R (SJC) (8899ft X 150ft 
asphalt grooved, elevation 56'). The weather is a very thin but 
complete overcast at 1000 ft. Winds calm. Traffic - the whole bay area 
has been cleared for your training session.

Please use the following settings:
 N 17345.9029
 E 05055.2686
 Alt 0 (Always use zero altitude, you'll come out at 9 ft field        
       elev at SFO)
 Heading 100
 Clouds: Top=1100 Bottom=1050 Overcast Deviation=0
 Winds: None please.
 Strobe: Off
 Reality: None please. (Hehe, but seriously no reality settings on.)
 Nav1 111.10 OBS 122 degrees (This station will not come alive yet.)
                              *ILS at SJC heading 123 degrees*
 Nav2 114.10 OBS 122 degrees (The needle should be full left DME 28.6)
                               VOR at SJC, our destination, we want to 
                               intercept and track 122 heading inbound.
 DME=Reading from Nav2 (As soon as Nav1 comes alive, we switch DME to 
                        Nav1.)
 Com1=118.85 SFO Tower
 Trim=1/2 notch upwards. (This is REQUIRED, use the <keypad 1> or 
                          END key.)
 Flaps=1 notch extended
 
 Flightplan: Depart SFO 10L, left turn to 040 intercept SJC 122, pop 
thru cloud deck, continue climb, intercept SJC 122, level at 4500', 
track 122 inbound until ILS comes alive at about 15 DME, switch DME to 
Nav1, track ILS localizer and glideslope down thru cloud deck to 
a visual final approach to landing on SJC 12R. Runway and ILS approach 
heading is 123 degrees. Elevation 56'.

With the trim set to 1/2 notch up, *AND* the elevator set to the 
center mark, you shouldn't need to touch the elevator at all (unless 
you're gonna flare the landing), control the whole profile with power 
and rudder/aileron after removing the takeoff trim. The airspeed will 
not vary more than five knots the whole flight, remaining in the 72-78 
range.

Step by step: Do all of the above setup. You'll be ready to roll from 
SFO. Just for fun, touch <enter>,1,<ins> to request takeoff clearance 
and receive a transponder code. Set the code. Wait for clearance, then 
depart at your leisure, by touching F2 or by any other means you 
desire. The Cessna will accelerate and rotate by itself at about 72 
knots. Please leave the flaps extended on notch and the landing gear 
extended for this exercise. After rotation, and the VSI is indicating 
a 500fpm climb, trim down <keypad 7> or <HOME>, until the trim 
indicator is at the middle position. Airspeed will increase, and pitch 
will decrease. Left turn to 040, this is the intercept heading we'll 
use to get to the SJC 122 inbound course. You will pop thru the 
overcast rather quickly. The Nav2 needle will come alive. Airspeed 78, 
climbing 600 fpm, power 2358. At 2500', airspeed still 78, climbing at 
500 fpm, power 2358. When the Nav2 vertical needle moves near the 
center, turn right to 122, center the needle, and keep it centered to 
track SJC 122 inbound. I'm at 22 DME and 3400', power 2358, airspeed 
78. Watch Nav1's needles and to/from window for activity. I'm at 4000' 
climbing at 500 fpm, 20 DME, heading 122, power 2358. On the radar 
view, I see we're crossing the San Mateo Bridge. As I approach 4480ft, 
I gradually ease the power back to 1443, and level at 4500'. (This is 
an ideal spot to save a mode!) Airspeed 78, DME 17.3. The heading 
starts to drift left on my FS4 Cessna, so I'm correcting to 122 or 
even 123 if the Nav2 vertical needle has drifted. Whatever heading 
corrections are necessary, make them gradually and continue inbound on 
SJC 122. I'm in level flight at 4500', doing landing check to see if 
gear is down, and flaps are set to one notch. Things are gonna start 
to get busy now. At 15.5 DME the Nav1 comes alive. Switch DME to read 
from Nav1 (B key). I'm at 14.6 DME from the Localizer for SJC ILS 12R. 
The needles on Nav1 are pretty close to centered, they're crossing 
above and to the left of the "donut", I'm a bit low and right of the 
ILS. I'm turning slightly left to 120, and powering back to 1218, 
anticipating the glideslope bar as it comes down from the top of the 
gauge. Now we're 12.2 DME, 120 degrees heading, power 1162, trim even, 
elevator even, airspeed 78, descending at 550 fpm. I'm 11.3 DME, power 
1162. The localizer vertical needle comes to center, and I'm on top of 
it to come right to a heading of 123. 9.8 DME. At 8.1 DME I'm a bit 
high, and having to correct to the right for the FS4 heading drift 
again. At 6.8 DME power is 1126, heading 122, very small corrections 
continue with power and heading. At 5.8 DME the Outer Marker blue 
light comes blaring on, we're crossing the OM at 2000' and heading 
121, power 1119. Closing on the runway, now 4.8 DME the OM has finally 
shut off, we're at 1600', power still 1119, heading still 121. At 4.1 
DME, I'm backing off the power to 1063. At 3.4 DME power back up to 
1119. Bang we go thru the cloud deck. The three runways at SJC are 
just sticks. Presently they turn to 3-D. Zoom your cockpit view to 2X 
if you wish but PLEASE DO NOT MAKE ADJUSTMENTS YET. It is a terrible 
temptation to do something now that you can see the runway, but please 
be patient. You will notice that you're closing on the threshold very 
neatly. The ILS needles should have been right in the circle in the 
center of the gauge. Touch 1,2,1 to activate the landing analysis. 
Now, finally, at 400', I'm making a minor correction to the right, and 
the Inner Marker yellow light is on and horn is sounding. Over the 
threshold, you now have permission to touch the elevator to flare, 
power back as you wish to make a graceful landing. I'll be frowning if 
you touchdown half-way down the 9000 ft strip though.

 Well, a little sweat on the palms, eh? Ready to try it again. Hope 
you saved that mode earlier, if not you can try it from the beginning. 
I hope you had a good time. 

Variations: You can set the clouds lower, and try to ride the ILS 
closer to the ground, there's even a mode in GAMERS LIB 10, SFO-
FOG.MOD (I think) that sets up a blanket of snow visual effect, and 
you can ride that scenario/cloud setup all the way to the ground on 
the ILS and check your position on the radar view after you've 
stopped. If you get brave try a 10 knot gentle breeze from 090 or 150 
degrees. 

 