Try doing this.
Create a query from your data, simply select fields then save query, qryNumbers, then create a report based on the query, add an extra textbox to the report and in the properties you would adjust the control source to =1 then look down the properties until you find running sum then cahnge No to Overall. this will number each record from 1 to the last record you display in the report.
If you have limited dialup then this is the best I can suggest for now.