Here are the 3 different Ford systems offered with the part numbers and a picture of the remote fob that comes with it (these are 2010 part numbers only, from the Ford accesory website you posted).
Remote Start only (basic system) Part Number: AW3Z-19G364-A
Remote Start only, Bi-Directional (2-way) Part Number: AC3Z-19G364-A
Remote Start, With Keyless Entry & Alarm Part Number (gold system): AL3Z-19G364-A
For the first two remote start systems, you would have to carry your factory keyless entry fob with you too. The first one is the one you get as the factory invoiced accessory remote start system if you order your truck with it. The second one is actually a 2-way type system, the button flashes green and the keyfob beeps to confirm that the truck started. The third system includes the alarm, and it replaces your factory keyless fob since the new fob does control keyless entry and remote start all in one fob. The extra 1 and 2 buttons on the fob are pretty much useless for our trucks. You could turn the alarm feature off if you want (if you don't like alarms), but at least then you would still have everything all in one key fob rather than having to carry 2 fobs around.
Using those part numbers, try shopping online like at www.tascafordparts.com
or other similar discount Ford parts dealers.
For either system, you also need the Ford PATS Interface/bypass kit, the part number is 8L3Z-19G365-BA. This kit is needed for the truck to start due to the PATS security chip in our keys. Other generic kits require you to leave a spare key up inside the dash. This kit actually simulates that a key is in the ignition and allows the truck to remote start. You just need your 2 master keys to program this kit.
The first two remote start only systems above actually install pretty easy now, they come with a plug-in harness that plugs directly into our trucks. Then there’s only about 6 wires or so left that you have to splice-in yourself. The 6-button fob remote start with alarm system does not come with any type of plug-in harness, so you have to tap/splice all of the necessary wires (about 16 or so total). Most of the wires you tap into are along the steering column and driver's side kick panel/door sill, but there's also 1 or 2 wires that you tap into at the passenger side kick panel at the smart junction box (SJB).
You can find some of the Ford technical install manuals here:
Just select “installation instructions” and then “electronics” and within there are the remote start and alarm files.
Oh, and for 2010 with My-Key, you'll want to change the settings for the system so it doesn't shut off when opening the door. I posted about it here and included links to the programming files for either the basic/2way rmst start system and the 6-button rmst/alarm: http://www.f150online.com/forums/200...ml#post4334935