You may not find anybody on here that is willing to put the time into finding their CD, zipping all the files up, and uploading the CD for you to download... it would be quite time consuming.
Your best bet would be to go to: http://www.encore-usa.com/us/support/ENHWI-N3
That's the support page for your router. It contains the product manual and quick start guide. You can follow the guides and setup everything manually. I was hoping they had the contents of the CD available for download however they do not.
Sorry I couldn't help you out any more than what I did.