If flying a CAT III approach, all the way to 50 feet or autoland, the ILS system in FS2002 would not be useful. In reality the planes flare themselves, however, the planes in 2002 will just kinda....keep going...lol The 747 (default) is really good at landing itself if you handle it right. My 727 for 2002 got an autoland upgrade and will be out soon with its new panel. The 777 is too hard to use the ILS APR option anyways, just fly the ILS manually. Other than that, your best bet is this:
Fly the approach at your final approach speed (if you are in a jet, 140 KIAS is a good judgement) around the pattern or straight it. Get down to 2000 or the altitude ATC clears you too (which is near 2000 anyways usually) and fly towards the ILS. With the frequency tuned, the ILS bars come alive. In reality you have an option here, turn it on or line it up. For the sake of not sending your wonderful sim-plane all over the glidescope to possibly a fiery 10-foot crater, I suggest you get it either descending on the glidescope, or lined up and 1-2 dots below. The autopilot will really do well if you line it up like this and will handle well. Placing it one or two dots below gives it time to push the nose over and intercept and is my prefered method.
If you REALLY want a challenge, try a CAT III autoland in the worst you can get. Do moderate crosswinds, 1/16 mile visibility with storms and fog and all that fun stuff. The autopilot will do good if you set it up and will really leave you with lots of smiles at the gate.
