get OE gaskets from ford or dont use anything, it will have the same effect. as for the RTV, you dont need it if you are just replacing the gaskets and there is nothing else wrong with the intake.
for the fuel rails, you need to remove the fuel lines coming in from the passanger side fender (get the tools from autozone, $3 tops). then the injectors just pop off the manifold. KEEP THE INJECTORS CONNECTED TO THE FUEL RAIL. this will prevent damage to the o-rings and make things a lot easier. once the injectors pop out of the manifold, you can remove all 8 injectors plus the fuel rails from the car at the same time. be careful of fuel that will leak out, as it may hurt the paint on the car.
RIP Gloria A. Torres
4/26/61 - 10/30/07
The best Mom-lady I could have ever asked for