What should I use?

I'm trying to make something like this http://www.keramikakanjiza.com/en/moj-ambijent/kupatilo002.html

You can choose EN on the top right to view the page in English.

I need to make a flash application that allows me to test floor tiles on a 3D scene using drag and drop (or any other way really).

I have couple of questions:

1) I was planing on doing this in ActionScript 3 since I haven't really done much flash before and I only worked in ActionScript a bit. Is there a better way to do this?

2) How do I go about importing a 3D scene into my flash app and making it "interactible"?

3) How do I change the texture of a floor tile on the 3D sceene? Is there a method for it or something? ( I thought about it like this: When the user drags the tile from the selection on the right, in the startDrag method i would take the texture of the floor tile and somehow "store" it in a variable or something and then when the user releases the mouse on top of a wall on the 3D scene it would change the texture of the wall to the "stored" texture. Is this doable or am I just talking nonsense?

Thank you for your time!