Hi ex902, don't be warrying about ...
Can answer with regard to Airbus A319/320/321, even if it should be almost the same for a most commercial aircraft:
1. Flaps/Slats extension is initiated a few miles before reaching the FAF/FAP and green dot (= VMD speed) is normally flown till CONF 1 is selected, at say 2/3 NM from FAF/FAP;
2. Flaps are sequencially extended throughout the decelaration;
3. Normally, landing gear is extended once CONF 2 is selected, but may be extended a bit earlier to help deceleration.
Bear in mind that FLAPS/LANDING GEAR/SPOILERS greatly increase parasite drag, thus increasing Vls (lowest speed that can be flown with A/THR engaged, having an appropriate margin above stall speed).
Hope that helps,
fredgrav