[eluser]onejaguar[/eluser]
The license agreement specifically states that the full license agreement must be included with any distribution, however you are more than welcome to change the file name or embed it in the documentation that ships with your product instead (e.g. both licenses in one file).
I don't think moving the system folder constituents modifying the file; you can locate it wherever you want. You'll notice that none of the files in the "Application" directory has a CI license on top because is it expected that you will replace everything in that directory and/or move it outside the "system" directory.