In most cases, these portable packages are pre-activated. If prompted, you may need a product key (which is often included in the same folder in a key.txt file). System Requirements
No. Microsoft has never released an official portable version of any Office suite, including Office 2007. Any "portable" version found online is an unofficial, third-party creation.
or "MS Office 2007 Portable Apps" Recommended Reliable Sources for Portable Software: