Sarah, create a Form that has one textbox on it and a button for opening the Report. Then when you want to open the report open this form, insert the number in the textbox you want to start the Report with and then click the button. In the Format Event for the Page Footer of the Report put this
Dim I as Integer
I = Forms!FormName!TextboxName
If IsNull(I) Then
Exit Sub
Else
Me.TextBoxName = "Page " & Me.Page + (I-1)
End If
When I tried to use an InputBox it asked for the value each time the page formatted so if you have a 30 page report it prompted you 30 times for the value of I. Using the Form, the form is open when the report opens so the value for I is always available. Post back if you have problems.
Paul