Okay... Well, that sounds like what I'm describing, so I'm confused. If you put a control on the report called txtCountMe, set its Control Source to =1, set its Visible property to No, set its Running Sum property to Yes, and then create a second control called txtShowMyCount, set its Control Source to
=[txtCountMe] & " of " & [Forms]![FrmYou'rePrintingFrom]![CtlWithNumberOfLabelsToPrint]
where you replace the form and control names with your own, does this do it?
Or is it that you need to control the number of labels to print and you don't know how to do that? See MS's setup for that here.