Any “portable” version you encounter would be a third-party repack that attempts to:

Before downloading or using a portable version, you must acknowledge the following:

By bundling specific configurations and resource files within the portable directory, developers ensure a consistent environment regardless of the host machine’s OS version, from Windows XP to Windows 11. Technical Foundation and Community Support

To run Visual FoxPro 9.0 SP2 Portable, your system should meet the following requirements:

Improved support for hierarchical XML and SQL Server integration through new data types like Varchar, Varbinary, and Blob.