You need to bleed the system with all the weight evenly to all four wheels (as if it was sat on its wheels - its hard to do if you ain't got a four post ramp or pit). Also if theres air in the abs pipes between the modules and the master cyclinder you'll need to press the two "abs bleed button" thingies on each module whilst someone else bleeds them - I'm sure the later haynes manual covers this. Its f'ing hard to do but can be sorted.