Greetings oam,

I would preface my comments with clearly stating that I have absolutely no experience(s) in your stated issue. That said:

I understand your first bit, to wit: "We have Excel 2007 and 2010 loaded on our computers due to policy and ..." to mean that each PC has Excel available in both 2007 and 2010 versions. Is that verified as correct?

If that is the case, my first effort would be to get to know a tech and learn how such a thing is accomplished.

I hope I am not wasting your time or efforts,

Mark