In order to use the spellname formula on a computer you must have a special module loaded up from Microsoft.  The following link has the info on how to create the SpellNumber module on your system. 

http://support.microsoft.com/kb/213360

KEY NOTES:

1.  You must perform this on each mahcine that will use the function otherwise when you go to a different machine then the function will break.  This function is only added to your local machine not to every machine you use.

2.  Make sure your Macro Security is not set too high otherwise they Visual Basic scripting will not run and the formula will show "?name#" instead of the spelled out formula.  Change Tools / Macros / Security and choose the Low option.  Click OK and now the formula should work.


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Below are the steps used from the website link above.

How to create the sample function Called SpellNumber

1. Start Microsoft Excel.
2. Press ALT+F11 to start the Visual Basic Editor.
3. On the Insert menu, click Module.
4. Type the following code into the module sheet.

   Option Explicit
   'Main Function
   Function SpellNumber(ByVal MyNumber)
       Dim Dollars, Cents, Temp
       Dim DecimalPlace, Count
       ReDim Place(9) As String
       Place(2) = " Thousand "
       Place(3) = " Million "
       Place(4) = " Billion "
       Place(5) = " Trillion "
       ' String representation of amount.
       MyNumber = Trim(Str(MyNumber))
       ' Position of decimal place 0 if none.
       DecimalPlace = InStr(MyNumber, ".")
       ' Convert cents and set MyNumber to dollar amount.
       If DecimalPlace > 0 Then
           Cents = GetTens(Left(Mid(MyNumber, DecimalPlace + 1) & _
                     "00", 2))
           MyNumber = Trim(Left(MyNumber, DecimalPlace - 1))
       End If
       Count = 1
       Do While MyNumber <> ""
           Temp = GetHundreds(Right(MyNumber, 3))
           If Temp <> "" Then Dollars = Temp & Place(Count) & Dollars
           If Len(MyNumber) > 3 Then
               MyNumber = Left(MyNumber, Len(MyNumber) - 3)
           Else
               MyNumber = ""
           End If
           Count = Count + 1
       Loop
       Select Case Dollars
           Case ""
               Dollars = "No Dollars"
           Case "One"
               Dollars = "One Dollar"
            Case Else
               Dollars = Dollars & " Dollars"
       End Select
       Select Case Cents
           Case ""
               Cents = " and No Cents"
           Case "One"
               Cents = " and One Cent"
                 Case Else
               Cents = " and " & Cents & " Cents"
       End Select
       SpellNumber = Dollars & Cents
   End Function
         
   ' Converts a number from 100-999 into text 
   Function GetHundreds(ByVal MyNumber)
       Dim Result As String
       If Val(MyNumber) = 0 Then Exit Function
       MyNumber = Right("000" & MyNumber, 3)
       ' Convert the hundreds place.
       If Mid(MyNumber, 1, 1) <> "0" Then
           Result = GetDigit(Mid(MyNumber, 1, 1)) & " Hundred "
       End If
       ' Convert the tens and ones place.
       If Mid(MyNumber, 2, 1) <> "0" Then
           Result = Result & GetTens(Mid(MyNumber, 2))
       Else
           Result = Result & GetDigit(Mid(MyNumber, 3))
       End If
       GetHundreds = Result
   End Function
         
   ' Converts a number from 10 to 99 into text. 
   Function GetTens(TensText)
       Dim Result As String
       Result = ""           ' Null out the temporary function value.
       If Val(Left(TensText, 1)) = 1 Then   ' If value between 10-19...
           Select Case Val(TensText)
               Case 10: Result = "Ten"
               Case 11: Result = "Eleven"
               Case 12: Result = "Twelve"
               Case 13: Result = "Thirteen"
               Case 14: Result = "Fourteen"
               Case 15: Result = "Fifteen"
               Case 16: Result = "Sixteen"
               Case 17: Result = "Seventeen"
               Case 18: Result = "Eighteen"
               Case 19: Result = "Nineteen"
               Case Else
           End Select
       Else                                 ' If value between 20-99...
           Select Case Val(Left(TensText, 1))
               Case 2: Result = "Twenty "
               Case 3: Result = "Thirty "
               Case 4: Result = "Forty "
               Case 5: Result = "Fifty "
               Case 6: Result = "Sixty "
               Case 7: Result = "Seventy "
               Case 8: Result = "Eighty "
               Case 9: Result = "Ninety "
               Case Else
           End Select
           Result = Result & GetDigit _
               (Right(TensText, 1))  ' Retrieve ones place.
       End If
       GetTens = Result
   End Function
        
   ' Converts a number from 1 to 9 into text. 
   Function GetDigit(Digit)
       Select Case Val(Digit)
           Case 1: GetDigit = "One"
           Case 2: GetDigit = "Two"
           Case 3: GetDigit = "Three"
           Case 4: GetDigit = "Four"
           Case 5: GetDigit = "Five"
           Case 6: GetDigit = "Six"
           Case 7: GetDigit = "Seven"
           Case 8: GetDigit = "Eight"
           Case 9: GetDigit = "Nine"
           Case Else: GetDigit = ""
       End Select
   End Function
   					

How to use the SpellNumber sample function

To use the sample functions to change a number to written text, use one of the methods demonstrated in the following examples:

Method 1: Direct Entry

You can change 32.50 into "Thirty Two Dollars and Fifty Cents" by entering the following formula into a cell:

Method 2: Cell reference

You can refer to other cells in the workbook. For example, enter the number 32.50 into cell A1, and type the following formula into another cell:

Method 3: Paste Function or Insert Function

To enter a custom function into a worksheet, you can use Paste Function in Excel 2000, or you can use Insert Function in Excel 2002 and in Excel 2003.

Excel 2000

To use Paste Function, follow these steps:

1. Select the cell that you want.
2. Click Paste Function on the Standard toolbar.
3. Under Function category, click User Defined.
4. Under Function name, click SpellNumber, and then click OK.
5. Enter the number or cell reference that you want, and then click OK.

Excel 2002 and Excel 2003

To use Insert Function, follow these steps:

1. Select the cell that you want.
2. Click Insert Function on the Standard toolbar.
3. Under Or select a category, click User Defined.
4. In the Select a function list, click SpellNumber, and then click OK.