You will need ford fuel line disconnect tool. It is inserted into the ends of the fuel filter lines to disconnect the lines. The tool is about $5 at a parts store. There is no other way to disconnect these lines without breaking them:
Fig. Typical fuel filter mounting along an under vehicle frame rail-1997-03 models
No. That is always recommended in any directions as just a sfety precaution.
Below is fuel pressure relief. two ways to do it. either relieve pressure at shraeder valve on the fuel rail, or remove the fuel pump fuse and crank engine and allow to run until it dies:
Fig. Schrader valve
Fig. Fuel pressure gauge installed