Need help with bone assignment on a particular dress

@gohliad since it's late and probably everybody who can help is sleeping so despite of my little knowledge of clothes meshes I still took a look at your file and what I see that you need to fix uv_1. There are a few vertices on the bow are misplaced, you need to move them. Also you see those sort of round pieces above the main uv? It's your buttons, so you need to scale them down and move in place. If you are not familiar with Uv_1 check this tutorial. There can be more problems with mesh but let's wait what more experienced members say, But for uv_0 you definitely need to fix that bow.

That is because you're talking about another UV map. Clothes have two. The UV_0, the one you apply the textures. That is the one you posted above. Then there's the UV_1 responsable for the clothes to work with sliders properly. That one doesn't look like the uv_0 and has its own specifications to make it correctly. That is the uv Feyona is refering to.

You have a tutorial by Andrew telling what it is and showing some examples. (You also have the template images you need to follow) HERE
Then, as Feyona linked you above. There's a tutorial by Elivah about a simple trick to make this uv map easily. It could be quite a lot of work to match the specifications but with this tutorial you will surely have no trouble with. HERE

If you have more trouble regarding the clothes post again. You need to also make the weight transfer and vertex paint to fully complete the project.

I just checked your .package in the game. The problem about the sim body floating is most definetly a weight problem. You need to transfer the weight again. Have you tried the tutorial here in the forum made by Brujah?.

And the other issue is the pearl buttons. They dont work with sliders. I think to solve this issue you can move them to place in the uv_1. In the picture you posted above, the pearls are not placed in the right place. You need to place them in the body map. The center one. It doesn't matter if it overlaps the other map. It will tell the game to move them when you move that area.

I can try to make some pictures If you don't undestand me, although it would be later. Since I don't have much time now

Edit:

So after the weight assigment. You have the tutorial HERE. Be sure to delete your existing weights before transfering the new ones.




HERE is the package to check what I did. As for the pears and the UV. I tried what I told you before but It doesnt quite work. It could be just the place they are located. I just made a planar map and place it in the front of the dress in the UV_1. If you guide yourself with Andrew's template you could get a better result. Maybe somebody know better how to do it. 

asdfghjkl; I didn't even think of removing the existing weights before transferring, I had only been doing so for the pearls prior to joining the meshes *face palm* It's just been one of those days, I guess. (like a monday, aka brain fart day)

Thank you both tons for looking at it, I removed the existing weights and THEN transferred the weights and everything is working fine now.
I'm working on the pearl button uv_0 right now, seeing what is the best placement... it will look a tad but funny with the pearls growing larger with the breasts/torso but it's much better than the pearls hovering around all crazy :P  Thank you both so much! My sims will be very happy embracing the 40's/50's era