Creative Commons license & other

Hello everyone ! I just recently joined CodeCanyon and i’ll be uploading some items soon. I have a question regarding licenses on some icons. I found a set of icons that are licensed under the Creative Commons. Here’s the link. http://creativecommons.org/licenses/by-nc/2.5/.

It says the license are for non-commercial items.If i want to use an icon for the product image altered or unaltered would i break the license ? (i would say so but asking just to make sure )

Also if anyone has some deeper knowledge in this field i would appreciate if you post a short summary about other licenses like ( GPL , LGPL, etc ) regarding usage on code canyon.

Thank you !

Thank you !