I did both the X-pipe and the cat-back by myself on jack stands, I have to say that I was very surprised how easy it was to get the stock x-pipe off. I unbolted the stock cat-back and cut it off just after the mufflers. Then I tied the back end of the stock x-pipe to the drive shaft for support before removing the x-pipe to manifold bolts with an extension, swivel, and an electric impact wrech (probably didn't need the impact wrech, but it was helpful). Once the bolts were off the studs, I suppported the front of the x-pipe with my knees and the lowered it onto my body and wriggled out from under the car with it. It probably wasn't the most elegant way to do it, but it worked.
I installed the new
Magnaflow catted x-pipe pretty much the same way, but in reverse. I found that it really helped to tie the x-pipe to the drive shaft. Also, leave the O2 sensors attached to the pipe when you remove it, then just transfer them to the new x-pipe in the same locations. Just be careful not to bash/damage them when you remove/install the x-pipe. Depending on your mileage, you may need a new gasket for the passenger side where the x-pipe bolts to the manifold. It's Ford part # XR3Z-9450-AA.
Don't forget to soak the bolts with penetrating oil (PB Blaster, Liquid Wrench, etc) before removing them. I did it the day before and found the bolts came out very easy.
The Magnaflow cat-back was also very easy to install and adjust. I was lucky....no leaks anywhere.
WES