The installation process for Adobe InDesign CS4 Portable Mega Install involves the following steps:
You can install it from the original DVD or Adobe account download (if still accessible). Portable versions are not official; Adobe never released a "portable" CS4. Running hacked portables can break system files and cause security issues. i adobe indesign cs4 portable mega install
If your needs are for marketing materials or social media rather than long-form book layout, Canva is a browser-based tool that is incredibly user-friendly. The free version is robust enough for many users. The installation process for Adobe InDesign CS4 Portable