Hi,
I did the same seat swap in my Titanium X. As long as both your front seats have power height adjust, the 8 way recaro adjustment will plug straight in. This is of course as long as the Recaros you have brought are from a facelift ST220, 2004-2007 i think. They need to be from the same type of car as yours, facelift or not facelift.
Have you got the heated seat switch? If you pull out the blank where the switch goes in your facia, there should be a wire attached to it. You will need to buy the switch surround (if you didn't get it with the switch) and the heated seat relay.
The relay fits into a holder that will be taped up behind the glovebox.
Everything should then work.

Good luck,

Nick