If you mean you just copied the already installed program files from your vista setup to dvd then , no you won't be be able to just just copy those files back to you Win 7 system and expect it tow work. What you need is the installation file and run that to re-install the prpgram. You'll also need the licence details. As PC makers rarely supply set up discs these days only a utility on the hard drive to restore your system to factory settings I don't think you'll be able to do what you want I'm afraid.
Open Office is a good alternative to MS Office and is free click here
There are other free anti-virus programs out there too such as Avast or MS Security essentials that would replace Norton.