Duck tape, cling film, cable ties and some bake bean tins for tubing!
Seriously, what saab model? and it also depends on where the inlet and outlet pipes exit, most people use the grill under the rad but your best bet is to get it infront or to the side of the rad, try to use more alloy bends than the silicone ones as they heat sap and you want the flow to be as cool as possible, im sure loads of guys on here can show you how theyve mounted theirs.
