Not a bad group of shots individually. The first comment I have is that each one has a noticeably different feel from the other three, they don't really feel like a cohesive group to me. Try to imagine all the shots from the wedding together in an album, or figure that the couple might pick any three to group in a frame - it might help if the images just felt more similar. Just something to think about...
As for the individual images here:
1. I like this - nice relaxed pose and smile by the bride. Good job working with the ambient light to still capture the detail in the dress. The only negative I see here is that the body of the limo converging to the background is trying to draw my eye to the right of the image, away from the bride. (And a very minor point, if you want to put more effort into this image, is that you might want to try cloning out the reflection of the second limo/other car near the front of this limo. It's a bit distracting and, since it's also white, might actually be part of what is drawing my eye that way.)
2. Strictly as a matter of personal taste I'm not a fan of the effect here...combined with the pastels of the sunset it gives this image too much of an 80's feel for me. I do think this treatment washed out too much detail in the gown's train and part of the veil.
3. At first glance it's easily my favorite shot of the four. I love how you used lighting to offset the bride and her friend while leaving just enough of the background visible to provide some context. It's also a nice capture of the gown with its trailing train, and we all know that good shots of the gown are important. However, by my fourth glance or so, I started to wonder - where is the lower half of the friend? I'm sure her legs are just hidden behind that part of the bride's gown (you can see patio then pool right up to the gown all the way to the first gather, above which it's all pretty black), but it's an interesting illusion. Now that I've noticed it I can't see her as anything other than a floating torso.
4. I like the concept but as has been mentioned there are some technical issues.