The high pressure hose can be replaced without removing the power steering rack. You'll need to remove the heat shield and the three bolts that holds the rack in place. (This is also an excellent time to replace those problematic bushings.) You'll then be able to drop the rack down 3 to 4 inches and have access the high pressure hose fitting. Take your time installing the hose into the rack as it is very easy to cross tread, especially since the area is very tight (it helps to have small hands here). You might also want to replace the low pressure one since the rack is down and accessible.