If you need the flexibility of a portable editor without the risks of the "White Rabbit" legacy build, consider these modern solutions:
You miss out on critical security patches and new camera RAW support provided in official versions. Modern Alternatives to Portable Photoshop
Traditional CS5 requires gigabytes of space; the White Rabbit build was stripped down to just a few hundred megabytes. adobe white rabbit photoshop cs5 portable best
Improved selection tools that made cutting out hair or complex furs much easier.
A tool that allows you to "pin" parts of an image and stretch or manipulate others realistically. If you need the flexibility of a portable
Because it lacked many background services and heavy startup scripts, it launched significantly faster than the full version.
Do you need like Content-Aware Fill or 3D rendering? A tool that allows you to "pin" parts
It was the go-to choice for netbooks and older laptops that couldn't handle the heavy demands of newer Creative Cloud versions. Key Features of Photoshop CS5
A free, web-based editor that looks and acts almost exactly like Photoshop. It runs in any browser, requiring no installation.
You could carry your entire workspace on a thumb drive and use it on any Windows PC.