...The installers and files are portable and Do NOT write to the control panel's registry. however it does require Admin Rights for installing to "Program Files"
It also does support "GoogleChromePortable.exe" if you want to use chrome from "PortableApps.com"
DISCLAIMER: I am NOT associated with Google. and the files don't contain anything from chrome itself. It just only has the ability to run in Incognito mode through a single exe.