If you're used to 2007; 2010 is going to be an absolute breeze to use in addition to being a significant upgrade in many of our minds. In one sense, 2010 is just an improved version of 2007. I think it will be a huge help to you to use the one that is most "supported" by your forum of choice and that's 2010. That's what urie was alluding to, at least in part, when he commented you would have chosen better to download something for which a working activation solution existed.