Yes the second diagram is for all 2001 F150's, including extra cab, supercrew. What remote start are you putting in? You also need a PATS bypass, which one are you using? I would suggest the PKF bypass. If you need one, let me know I have a few left. I install remote starts on the side from Sept-March. I rarely do any during the summer. A few suggestions on doing it.
Solder EVERY connection, do not use T-taps ect. Test every wire before connecting to it. Take your time and route the wires so it looks factory, try bundleing the wires together and tape them up. Use high quality tape, I use 3M Super 33, but its pretty expensive, for a good quality low price tape use the 3M Tartan (usually under a buck at NAPA, or Lowes, Home Depot). If you run into any problems, feel free to email me.