Page Setup / Print Formatting

Ok, been mulling over this for a while and I've gotten close, but here's my initial code:

Some pre-info, the macro's before this combine data from about 15 worksheets down to 2 worksheets and format them just the way I want them to look, except that in the process the print area gets totally hosed up. The worksheets are a set width, but can vary in height from a few dozen rows to hundreds.

Here's the code so far:

Sub PrintingSetup()
'
' PrintingSetup Macro
'

'


Sheets("Sheet1").Select
    ActiveSheet.PageSetup.PrintArea = "$A1:$O200"
    Application.PrintCommunication = False
    With ActiveSheet.PageSetup
        .LeftHeader = ""
        .CenterHeader = ""
        .RightHeader = ""
        .LeftFooter = ""
        .CenterFooter = ""
        .RightFooter = ""
        .LeftMargin = Application.InchesToPoints(0.25)
        .RightMargin = Application.InchesToPoints(0.25)
        .TopMargin = Application.InchesToPoints(0.25)
        .BottomMargin = Application.InchesToPoints(0.25)
        .HeaderMargin = Application.InchesToPoints(0.25)
        .FooterMargin = Application.InchesToPoints(0.25)
        .PrintHeadings = False
        .PrintGridlines = False
        .PrintComments = xlPrintNoComments
        .PrintQuality = 600
        .CenterHorizontally = True
        .CenterVertically = False
        .Orientation = xlLandscape
        .Draft = False
        .PaperSize = xlPaperLetter
        .FirstPageNumber = xlAutomatic
        .Order = xlDownThenOver
        .BlackAndWhite = False
        .Zoom = False
        .FitToPagesWide = 1
        .FitToPagesTall = 4
        .PrintErrors = xlPrintErrorsDisplayed
        .OddAndEvenPagesHeaderFooter = False
        .DifferentFirstPageHeaderFooter = False
        .ScaleWithDocHeaderFooter = True
        .AlignMarginsHeaderFooter = True
        .EvenPage.LeftHeader.Text = ""
        .EvenPage.CenterHeader.Text = ""
        .EvenPage.RightHeader.Text = ""
        .EvenPage.LeftFooter.Text = ""
        .EvenPage.CenterFooter.Text = ""
        .EvenPage.RightFooter.Text = ""
        .FirstPage.LeftHeader.Text = ""
        .FirstPage.CenterHeader.Text = ""
        .FirstPage.RightHeader.Text = ""
        .FirstPage.LeftFooter.Text = ""
        .FirstPage.CenterFooter.Text = ""
        .FirstPage.RightFooter.Text = ""
    End With
    Application.PrintCommunication = True
    Range("A1:O1").Select

Here's the problem... I don't want the print area to be set to 200 rows, I want it to be set to the last row in the spreadsheet. Now I know how to find the last row containing data, and select the next row in the spreadsheet (the first empty row) using this code:

' Find Totals Row

Cells.Find(What:="Totals", After:=ActiveCell, LookIn:=xlFormulas, _
        LookAt:=xlPart, SearchOrder:=xlByRows, SearchDirection:=xlNext, _
        MatchCase:=True, SearchFormat:=False).Activate

    ActiveCell.Offset(1, 0).Range("A1").Select

    Rows(ActiveCell.Row).Select

So, any idea how to dynamically set the print area to the last populated row, instead of a defined 200 rows?

Thanks!