Different background screens

[cmrhema]

Hi,

I am going to install a .net framework project, using ECLIPSE NSIS.
When the installer is launched in the clients place, I want the installer to run different pages.
That is, eg. if we install any windows application then we will have a dialog box stating, "ready for download" then there will be progress bar stating "downloading, kindly wait" and then later on we will notice another dialog box stating "downloaded successfully, thanks ".

I want in the similiar fashion, that while downloading I want different screens.

I hope I have made myself clear.
Kindly let me know, how do I implement this.

Regards
cmrhema