I used sealant to bond them on then put small screws in each one, then used filler to fill all the holes and get them nice and smooth. They came out really well i think, there are a few bits that could have been done better but you cant see them unless you get really close up to them!
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Colorado Red 07 Plate ST

Mountune CAIS - 60mm Throttle Body - Full Resonated Milltek System - Bilstein B12's - 300mm front discs - Gloss Black Team Dynamics Pro Race 3's - Tints - Red-Black DMB Badges and loads of eBay stuff...