This is a myth, when you install a game on steam, simply right click on it in your library, go to properties, click the updates tab, and from the drop down box select DO NOT KEEP THIS GAME UP TO DATE.
Steam forcing you to update your games is a myth, it simply downloads what is the latest version at the time of download, you can turn off updates if you're desperate enough to.
Strange, only does that for me if I completely uninstall and then reinstall Steam again after having formatted Windows.
As for your problem of using a NoDVD forget about it, just buy it on steam like everybody else, and use the Steam trainer like everybody else. It works fine, the crew at CH work to get around gameguard and similar checks so noDVD's arent necessary.