vba to change DateLastModified of 5 files to be now, now +2 seconds ... thru now + 8 second

I sometimes have a directory with many related files which are in a particular order. I name them so that an alpha sort gives me the best view. But, sometimes I also want thee datelastmodified to also be sequential.  For example

mod date     filename
5:05:13    Att 00 the answer to your question.doc
5:05:15    att 01.xls backup summary.xls
5:05:17    att 02.xlsx backup detail.xlsx
5:05:19    att 03 signed contract.pdf
5:05:21    att 04 original quote.pdf

So, I tried the following vba program, which almost works but gives slightly random results.   It seems like windows lastmodifieddate is an approximation of the actual update time. The file dates ended up like this
5/28/2015 5:03:24 PM  < time of actual update was perfect. 2 seconds after each update
5/28/2015 5:03:26 PM
5/28/2015 5:03:28 PM
5/28/2015 5:03:30 PM
5/28/2015 5:03:32 PM
5/28/2015 5:03:35 PM
5/28/2015 5:03:37 PM
5/28/2015 5:03:39 PM
5/28/2015 5:03:41 PM
 ==== results ====
5/28/2015 3:59:07 PM
5/28/2015 3:59:07 PM < time of date datelastmodified is wrong.  notice dups
5/28/2015 3:59:39 PM < notice very big jump in seconds.
5/28/2015 3:59:45 PM  
5/28/2015 3:59:45 PM  < notice dups
5/28/2015 3:59:51 PM
5/28/2015 3:59:57 PM
5/28/2015 4:00:03 PM

Does anybody have any idea of how to make the following code work?  By the way, I do NOT want code that can change the file to an arbitrary date in the past.  I was a former auditor for an international accounting firm, so I kind of dislike that kind of code.

Sub UpdateOutlook()

Dim p As Integer, q As Integer
    Dim filename As String
    filename = "C:\Users\bob.berke\AppData\Roaming\Microsoft\Outlook\VbaProject.OTM"
    filename = InputBox("enter filename", , filename)
    If StrPtr(filename) = StrPtr(vbNullString) Then Exit Sub
    filename = Replace(filename, """", "")
    Open filename For Binary As #1
    Get #1, 1, p
    On Error Resume Next
    Put #1, 1, p
    If err <> 0 Then
        MsgBox "Please close C:\Users\bob.berke\AppData\Roaming\Microsoft\Outlook\VbaProject.OTM"
        Close #1
        Exit Sub
    End If
    Close #1
    If InStr(1, filename, ".otm", 1) > 0 Then MsgBox "Date Modified has been set to Now() for VbaProject.otm" _
    & vbCrLf & vbCrLf & "Did your remember to drop VBA reference to 'Micro Office 14.0 Object Library'?"
End Sub
Sub modfiles()
' this routine will change the update date and time so that each file is updated 2 seconds after the previous file
Dim filename As Variant
Dim p As Integer, cnt As Long, anames()
filename = Dir("c:\keepempty\att*")
Do While filename <> ""
    cnt = cnt + 1
    ReDim Preserve anames(1 To cnt)
    anames(cnt) = filename
    filename = Dir()

' Call bubblesort(anames)  temporarily comment out this the bubblesort to avoid overcomplicating this EE question

For Each filename In anames
    Debug.Print now() & " " & filename
    Open filename For Binary As #1
    Get #1, 1, p
   ' On Error Resume Next
    Put #1, 1, p
    Close #1
    DoEvents  ' desparate attempt to fix things
    Sleep 2000
    DoEvents  ' desparate attempt to fix things
Debug.Print " ==== results ===="
Dim fso As New FileSystemObject, file As file

' show the results
For Each file In fso.GetFolder("c:\keepempty").Files
    Debug.Print file.DateLastModified & "    " & file.name

Exit Sub

End Sub

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David Johnson, CD, MVPOwnerCommented:
between each file change sleep 2 seconds and don't worry if the file date is > 2 seconds later.
rberkeConsultantAuthor Commented:
That does not make any sense.   line 45 says Sleep 2000 milliseconds.  What are you suggesting I change it to?
David Johnson, CD, MVPOwnerCommented:
Sorry I missed that line. mea culpa
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David Johnson, CD, MVPOwnerCommented:
Instead of reading a byte and then writing the byte back simply set the modified date time
Set objShell = CreateObject("Shell.Application")
Set objFolder =   objShell.NameSpace(filepath")
Set objFolderItem =  objFolder.ParseName(filename)
objFolderItem.ModifyDate = Now  
Sleep 2000

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rberkeConsultantAuthor Commented:
dave, exactly what I needed except I dropped the Sleep entirely.  The last 2 lines now show

objFolderItem.ModifyDate = Now + cnt/24/60/60 ' add 2 seconds for each file
cnt = cnt + 2
rberkeConsultantAuthor Commented:
here is my final code which uses previously written routines ClipPasteFiles and BubbleSort.

Sub modFiles()

' this routine will change the update date and time so that each file is updated 1 seconds after the previous file

' 1) Open explorer and select the files you want updated.
' 2) Copy them to the clipboard using Control C
' 3) call ModFiles

Dim objshell As Object, objFolder, objItem, objFolderItem As FolderItem2, cnt, anames() As String, fullName, fileName, filePath

anames = clipPasteFiles()
Call bubble(anames) ' sort them alphabetically

For Each fullName In anames
    filePath = Left(fullName, InStrRev(fullName, "\") - 1)
    fileName = Mid(fullName, InStrRev(fullName, "\") + 1)
    If objshell Is Nothing Then
        Set objshell = CreateObject("Shell.Application")
        Set objFolder = objshell.Namespace(filePath)
    End If
    Set objFolderItem = objFolder.ParseName(fileName)
    objFolderItem.ModifyDate = now + cnt / 24 / 3600
    cnt = cnt + 1

Exit Sub

End Sub

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