Does anyone have any fitting instructions for Bilstein suspension kits? Some friends of mine fitted the sprintline suspension kit to my Focus at the weekend, and the rear is knocking like a bastard

Something's obviously missing and I can't work out whether it's something that shoudl have come with the kit, or something that is a standard Ford part.
The kit didn't come with any fitting instructions or a list of what was included in the box (bough brand new from Chris at Carnoisseur - he's looking into it for me).
It would probably help if I hadn't gone from standard Ford suspension to H&R coilovers, then to GAZ Shock coilovers to this.....it's got a bit confusing along the way I think.
Tried searching the internet, but can't find anything

God it's driving me mad!!!!!
Ruth