You may opt to have three different shortcuts for each of the options like:
"C:\Documents and Settings\Papa\Local Settings\Application Data\Google\Chrome\Application\chrome.exe" --single-process
... as how I set it up for one of my shortcut to Chrome.
As explained in Marc Chung's page as to why process model is important,
"The short answer is robustness. A web application running in your browser, is a lot like an application running on your operating system, with one important distinction: Modern operating systems run applications in their own separate process space, while modern browsers run web applications in the same process space. By running applications in separate processes, the OS can terminate a malicious (or poorly written) application without affecting the rest of the OS. The browser, on the other hand, can't do this. Consequently a single rogue application can suck up mountains of memory and eventually crash your entire browser session, along with every other web application you were using at the time."