Photoshop CS5.1 Extended (portable version) Runs on WinXP, Vista, & Win 7
Even though this is a portable edition it is not limited - INCREDIBILITY it has all the features of a full install - I mean plug-ins, filters, brushes, gradients, actions, etc. The only thing I found missing was the help file.
Photoshop CS5.1 Extended contains 18 new features that CS4 didn’t have, plus a further 14 more that have been enhanced.
(New Features include:- Puppet Warp, Content-Aware Fill, Intelligent Edge-Selection Technology, and Adobe Repousse (3D) Technology)