Don,
Based on Naomi's macro

oExcel = CREATEOBJECT([Excel.Application])
oExcel.WorkdBooks.Add()
oExcel.Cell(1,1).Text = [asdasd asd asd asdasdasdasdasdasd]
With oExcel.ActiveCell.Characters(1, 5).Font
        .Name = "Arial"
        .FontStyle = "Regular"
        .Size = 10
EndWith

With oExcel.ActiveCell.Characters(6, 5).Font
        .Name = "Arial"
        .FontStyle = "Regular"
        .Size = 10
        .Superscript = .t.
    EndWith
EndWith

Not tested because I have no MS Office installed on my computer, so maybe I am completely wrong.
Unfortunately MS Office 2007 can't be installed on Server OS with Terminal services turned ON.