Bell Curve in Excel 2010

I am trying to create a bell curve graff, firstly to reflect the standard IQ bell curve but then to overlay it using results captured from an IQ study I am conducting. Can anybody help?

If you want to perform statistical studies in excel, check out this add-on. There's a free trial if you just need it for a single project.

http://www.xlstat.com/en/

Thanks jj554, I will give it a go