I wonder that your problem is not to be able to install Microsoft Office, because it is on a DVD and you don`t have a DVD Rom.
So why don`t you try copying the contents of the DVD into a flash memory or some other CD`s. If your office DVD is locked and can`t be copied, you can use external DVD roms.
There is another good way too, you can connect your laptop to another PC having DVD rom, using a network cable. then you can share the DVD ROM and install Office properly.