I am working for project so its urgent
Look at "InstallingSoftware" on https://help.ubuntu.com/community/InstallingSoftware. Scroll down to "Installing packages without an Internet connection"
Also look at the link "Installing packages without an Internet connection" on https://help.ubuntu.com/8.04/add-applications/C/offline.html
Look at APTonCD on http://aptoncd.sourceforge.net/
Look at Keryx on https://launchpad.net/keryx