^just that the cd/dvd repository line is added in ur /etc/apt/sources.list .if u remove the cd/dvd line and do a apt-get update,it will not ask.
for backup's there is already rsync.and regarding creating deb packages means you have to make the source code "debianised" ie,having installation paths,docs(readme's etc) etc well defined.then u may be successful.also,the "newbiedoc" or debian admin guide that can be apt-get install or available online will help.and not to forget,it needs patience and some amount of knowledge in programming.
edit found a cool tool :
Undelete files on Linux with GIIS
Imagine you just finished writing an important document with your favorite word processor. You hit save, and turn in for the night, satisfied that everything is fine. Unbeknownst to you, something happens as you slumber. Maybe it's a wayward nephew, maybe it's your cat, but at some point, something or someone deleted your precious file. What do you do?
Rest easy, friend, and take a look at this. Although the author of this app doesn't seem to know how to run SpellCheck, Get It I Say (GIIS) is an invaluable data recovery tool. All you need is a Linux based system and a hard disk partition that uses EXT2 or EXT3.
*www.downloadsquad.com/2007/12/28/undelete-files-on-linux-with-giis/
*sourceforge.net/projects/giis/
*sourceforge.net/project/screenshots.php?group_id=156518