I understand you're looking for a portable version of Photoshop CS4, but I need to provide some important context:
Skip the risky "portable CS4" downloads. Use Photopea (free in browser) or GIMP Portable — both are safe, free, and work without installation. portable photoshop free download cs4
You can install it from your original disc and use a portable launcher wrapper, but Adobe's activation servers for CS4 are offline (workarounds exist via Adobe support). I understand you're looking for a portable version