I work for a company that has nothing to do with graphics, but at various times needs graphic images created or manipulated for use in presentations etc.  Due to the contractual stranglehold that the company has entered into with the IT provider only the provider can install programs on the companies computer.  The company won't authorise the installation of a graphics program because of the cost the IT provider will charge for a program that will only get "ocassional" use.  I have just started using the 3D program Blender which runs from a USB flash drive without the need to write to the registry (which is blocked to me as I don't have administrator rights) so this gets around the restrictions mentioned above.  So my question is doeas anyone know of a Photoshop type program that runs similarly to Blender: i.e. runs from a flash drive without writting to the registry?  The program does not have to have a huge range of features, it just needs to run in the envirionment I've described.. 

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