No its not that hard, they are pretty much universal and Umnitza deals with allot BMW stuff anyways to begin with, not so much Lincoln! I see allot of people getting the first set they ever owned and coming up with this paranoia that they don't work cause they don't understand the product.
Mine are killer and soon as I find a lower Kelvin bulb somewhere cheap to match the yellow fogs I have now Im getting a set to replace those.
I hear ya, a little after I purchased the first kit I bought a second kit, 3000K for the fogs. I'd love that clean look on both lamps but the fogs are fogs for a reason and here in the Salt Lake City area it does get foggy sometimes.