If you must use Office 2003 or need portability, consider these verified methods: Virtual Machines (VM)
If you're looking for a more modern alternative to Microsoft Office 2003, consider the following options: Microsoft Office 2003 Portable Download REPACK
files with a compatibility pack, it often breaks modern formatting and features. Modern, Safe Alternatives If you must use Office 2003 or need
REPACK is a term used to describe a repackaged version of a software that has been modified to make it more convenient for users. In the case of Microsoft Office 2003 Portable REPACK, the software has been repackaged to include all the necessary files and settings to run the application from a portable device. Microsoft Office 2003 Portable Download REPACK