HALF LIFE 2 question (not a crack request)

[FarCry]

now that i have downloaded all the updates for half life 2, counter strike source and half life source i have the collectors edition dvd rom can i compress them into cab files and replace them with the old ones on the dvd? thus making a dvd with all the current updates after decompression. Is that a vital solution or shall i have to make a second dvd with all the backups of the games mentioned earlier? i will put the new updated steam version if i find an msi installation somewhere instead of the installer. thanks in advance