How to Change Google Chrome Portable Icon?

I love using portable apps, and I would love to see if I can customize its icon.
I was using other person's computer and found out, there was also a Google Chrome, but not portable.
I wanted to differentiate mine from them, by a simple tweak in my icon, since I always get confused.
I tried going to AppInfo to change the appicons, but it didn't work.
How can I change my GoogleChromePortable icon?
I'd love to hear your answers.
Thank you very much and may you have a wonderful day.