|What you are looking is known as a "portable application". |
These are apps that don't need to be installed and can be run from a folder on a system or even an external storage device. I use a couple on a machine with a corporate image where they won't give me Admin rights to install apps.
DAGS portable applications for some sites that offer portable apps.
DAGS portable autocomplete and see what you get.
Don't know if this will do it for you, but it looks promising: