Jack and support the car by it's drip edge (aka where the manual says to jack it from)
Put a board across the subframe (I prefer a 4x4) in the back with jack under it.
Remove the two 18mm bolts at the rear of the subframe.
Lower it 2 inches.
The only thing that can happen by doing this is the steering linkage coudl come undone. It's usually nto an issue with 2 inches or less. Heck..I've got nearly 3-4 before.