visual studio setup deployment custom action

Question

i want to create a setup for website upgrade, with this setup after welcome dialog i want a droupdownlist to show all websites in that pc's IIS and according to the selection of droupdownlist copy new files to that website.
 
i like to know is this possible or any other way to achieve that?
Problem facing: 
1.How to add a droupdownlist in setup userinterface?
2.How to bind droupdownlist with all websites available ?
3.How to copy files to dynamically selected folder path?