On most shortcuts, you right click, go to properties, and then click change icon. (In a folder, go the customization panel.) Now, locate where you saved the icons, and select the one you want. Done. You've probably figured this out by now, since it's been ages, but, here you go, just in-case.
Oh, I just found them in your page. Nice! I should drop the link here: zainadeel.deviantart.com/art/Q... Consider adding these and the Office ones in the description so that you don't get these questions all the time. Thanks again!