If you mean adapting your standard lights to HID with an aftermarket kit - then I'll start the moaning, sorry.
I'm getting fed up of being dazzled by those kind of kits, could be that they're not fitted properly, but ultimately the headlight units themselves were never designed to be used in that manner. I can't imagine that they give a light that is anywhere near as good as the other option...........
..........which is the one I'd prefer in your position - get some RS ff (although they were available on other specifications as well weren't they?) headlight units including all the other gubbins (bulbs obviously, igniter, ballast?) and fit those. But not as cheap as the first option.