Web Package Deployement

Question

Hi,
I am working on a MVC 4 application, and I am doing creation of package for each module. When I install the package in a different MVC application(this is the main application), all related files and content goes to Application's Areas folder, but I need to deploy package's dll file in main application's bin folder.

I am not getting any clue regarding what I am missing in creation of package.
Can any body please help me.

Thanks,
VD Tripathi