Also not a lawyer, but from what I understand typically open source license restrictions are on redistribution - there's nothing preventing you from modifying something for personal use in more or less whatever way you want.
I should not have paraphrased... it says "TERMS THAT PERMIT A RECIPIENT TO COPY, REDISTRIBUTE, AND MODIFY THE SOFTWARE WITHOUT RESTRICTION".
The way I interpret that is that redistributing cannot be restricted either, which wouldn't work for say, the GPL, as far as I understand it.
I should not have paraphrased... it says "TERMS THAT PERMIT A RECIPIENT TO COPY, REDISTRIBUTE, AND MODIFY THE SOFTWARE WITHOUT RESTRICTION".
The way I interpret that is that redistributing cannot be restricted either, which wouldn't work for say, the GPL, as far as I understand it.