If you searched the archives, have a Bentley manual, and printed out instructions from Bruno's site. http://www.bmwe34.net/ you should be in good shape.
One thing you should be aware of is upon reassembly of the new shock/spring/strut setup, make sure the spring is compressed so there is no load on the top nut when you begin to torque it or it will break the top shaft on the shock. According to Yves at BMA this has happened often with the Sachs kit -and yes, it happened to me.
I would think with a newly lowered ride height you will need to loosen and retorque the thrust arms.