Factory bi-xenon to bi-xenon with LEDs

Hi folks, I'm tossing around the idea of replacing my current bi-xenons with the LED bi-xenons. I have the Euro switch and love my LED city lights and want to have the LEDs come on with those. I have the DRLs coded off.

How difficult is it to swap out the parts from the original bi-xenons to a new set?

Cheers!