Change Excel Headings Through Access VBA Then Import The File

I've been able to find the code I need to import the file, but there are headers that come through from the group sending the excel file that will not import - they have a "." in them and that won't work. I need to find a way to remove the character and bring the excel header in line with the access table I'm importing to. I'm using the following to import the file:

Sub Example()
'the path to the excel workbook
Dim strExcelPath As String
strExcelPath = "C: est est esting.xls"
'import data from excel
Call DoCmd.TransferSpreadsheet(acImport, _
acSpreadsheetTypeExcel8, "testtable", strExcelPath, _
True, "A1:AA11")
End Sub

And that work fine up until it hits the offending headers. what is a good, quick bit of code to plug in to alter the headers and what, if any references would need to be added?