It's a fairly straight-forward job, just take your time jacking up and supporting the car.
The rear end of the sub-frame DOES have to be lowered about 3".
Make sure everything is well supported.
Give all those who are around a heads up of the cursing to come from under the car.
Having a couple floor jacks will make things easier.
Line wrenches will speed the process up a bit. PB blast all the Rack mounting bolts a couple hours in advance.
And don't forget to disconnect the steering column before you lower the frame.