Copying Files With Multiple Sheets Into One Master File

How do I write a vb macro that copies everything from multiple files, including sheets within files, and puts them into one master file. Here's what I have so far. I used a script from gnaga that worked great but it didn't copy seperate sheets. If you can help me out, I would greatly appreciate it.

Sub MergeSheets()
Dim SrcBook As Workbook
Dim fso As Object, f As Object, ff As Object, f1 As Object

Application.ScreenUpdating = False
Set fso = CreateObject("Scripting.FileSystemObject")
Set f = fso.Getfolder("C:Temp")
Set ff = f.Files

For Each f1 In ff..........

Set