I did the Brake Hydraulic Overhaul in my 1998 528i (E39) a few years ago.
I wrote up all the tricks in that thread.

Take your time to read through it...

DIY: 1998 BMW 528i Brake Hydraulic System Overhaul (6 Hoses, Caliper Seals/Boots) - Bimmerfest - BMW Forums

__________________
1998 E39 528i 5sp MT
2006 E53 X5 3.0 6sp MT