Benefits of removing tracks this way are:
As always, have a backup of your library (and library of files) made before doing any of this. Caveat Emptor and all that. :)
' so here we begin the main portion of the script
Const ForReading = 1, ForWriting = 2, ForAppending = 8
Const TristateUseDefault = -2, TristateTrue = -1, TristateFalse = 0
Dim fso, MyFile, FileName, TextLine
Set fso = CreateObject("Scripting.FileSystemObject")
' Open the file for output.
FileName = ".\ResultsFile.txt"
Set MyFile = fso.OpenTextFile(FileName, ForWriting, True)
' Write the result of the function directly to the file
MyFile.WriteLine findfilesmod
' Because you have to close every door you open
MyFile.Close
function findFilesMod
 ' I really like the ability to run test runs, and having the timings makes it a cake
 resultstring = ""
 resultstring = "Beginning " & cstr(time) & vbcrlf
 
 ' Otherwise, make some variables!
 ITTrackKindFile = 1
 deletedTracks = 0
 counter = 0
 
 ' Get a copy of iTunes running
 set iTunesApp = WScript.CreateObject("iTunes.Application")
 set mainLibrary = iTunesApp.LibraryPlaylist
 ' Since we're trying to get to the full list of songs, we need this
 set tracks = mainLibrary.Tracks
 
 ' Now then! We loop the full library to touch the tracks
 for each currTrack in tracks
  
' is this a file track?
  if (currTrack.Kind = ITTrackKindFile) then
   
' if the track has the date we're looking for, in this case 1 January 2001, then
   if (cdate(currTrack.ModificationDate) >= cdate("1/1/2001 00:00:00")) and (cdate(currTrack.ModificationDate) < cdate("1/2/2001 00:00:00")) then
' keep track of what's deleted, so it hits the results file     
' Then, mark the track     
resultstring =  resultstring & currTrack.Name & _
     "(" & currtrack.genre & ") - " _
     & currTrack.ModificationDate & vbcrlf
currtrack.genre = "ToDelete"
' increment the counter     
counter = counter + 1    
end if   
end if    
' if you want an early out after deleting a set number of files, you can use this   
' otherwise, this script will loop iTunes whole library, nuking as it goes   
'if counter >= 1 then exit for
 next
 ' the last output 
 resultstring =  resultstring & "Counted " & counter & " track(s)." & vbcrlf
 resultstring =  resultstring & "Finished at " & cstr(time) & vbcrlf
 ' return the results
 findfilesmod = resultstring
end function