You will need the installation CD. You can't just copy things over. I'm an ex-Unix hacker. Things were easier there. Ship the source code, compile it. If you were on the same hardware and version of Unix then copying the executables was enough. Windows has installers and this thing called the registry that I won't touch unless I have VERY specific instructions. There are some executables that run without the registry, but Office isn't one of them.

I don't know if the installation software is available on line for Office 2007 - even then, you will need a valid license key. Also there is a good chance the new machine won't have a CD drive, you may have to copy your CD to a flash drive. I've done that with other software and it works.