Need to add to defrag vbscript

Hi
I know nothing about vbscript but I am trying to learn, I found this freeby script on the web and it does what I want. I would like to enhance it however to do three things:-
1. I would like to be able to enter the number of times the defrag script runs.
2. I would like the script to restart the PC on completion
3. On restart I would like CHKDSK to run

Any idea’s gratefully received; I don’t think it’ll be much of a problem for an expert.

Here’s the script

'defrag_all2.vbs
'Defrags all hard disks - Can be run as a Scheduled Task
'Modified to create an error log and display it
'© Doug Knox - 4/13/2002
'This code may be freely distributed/modified

Option Explicit

Dim WshShell, fso, d, dc, ErrStr(), Return, X, A(), MyFile, I, MyBox, Drive

Set WshShell = WScript.CreateObject("WScript.Shell")
Set fso = CreateObject("Scripting.FileSystemObject")
X = 0

Set dc = fso.Drives
For Each d in DC
If d.DriveType = 2 Then
X = X + 1

'Determine drive letter of first fixed disk
'This is the drive that the error report will be placed on
If X = 1 Then
Drive = d
End If
End If
Next

ReDim A(X)
ReDim ErrStr(X)

X = 0
For Each d in dc
If d.DriveType = 2 Then
X = X + 1
Return = WshShell.Run("defrag " & d & " -f", 1, TRUE)

'Determine the Error code returned by Defrag for the current drive and save it
If return = 0 then
ErrStr(x) = ErrStr(x) & "Drive " & d & " Defrag completed successfully" & vbCRLF
elseif return = 1 then
ErrStr(x) = ErrStr(x) & "Drive " & d & " Defrag aborted with error level " & return & " (defrag was cancelled manually) " & vbCRLF
elseif return = 2 then
ErrStr(x) = ErrStr(x) & "Drive " & d & " Defrag aborted with error level " & return & " (there was a command line error. Check your command line for valid switches and drives)" & vbCRLF
elseif return = 3 then
ErrStr(x) = ErrStr(x) & "Drive " & d & " Defrag aborted with error level " & return & " (there was an unknown error)" & vbCRLF
elseif return = 4 then
ErrStr(x) = ErrStr(x) & "Drive " & d & " Defrag aborted with error level " & return & " (defrag could not run due to insufficient memory resources)" & vbCRLF
'errorlevel 5 is not currently used
elseif return = 5 then
ErrStr(x) = ErrStr(x) & "Drive " & d & " Defrag aborted with error level " & return & " (general error)" & vbCRLF
elseif return = 6 then
ErrStr(x) = ErrStr(x) & "Drive " & d & " Defrag aborted with error level " & return & "(System error: either the account used to run defrag is not an administrator, there is a problem loading the resource DLL, or a defrag engine could not be accessed. Check for proper user permissions and run Sfc.exe to validate system files)" & vbCRLF
elseif return = 7 then
ErrStr(x) = ErrStr(x) & "Drive " & d & " Defrag aborted with error level " & return & " (There is not enough free space on the drive. Defrag needs 15% free space to run on a volume)" & vbCRLF
else
ErrStr(x) = ErrStr(x) & "Drive " & d & " Defrag aborted with an unknown error level: " & return & vbCRLF
end if

End If
Next

'Create the Error Report in the root of the first fixed disk.
Set MyFile = fso.OpenTextFile(Drive & "\defragreport.txt", 2, True)
MyFile.WriteLine(Date) & vbCRLF
MyFile.WriteLine(Time) & vbCRLF
For I = 1 to X
MyFile.WriteLine(ErrStr(I))
Next
MyFile.Close

Return = WshShell.Run(Drive & "\defragreport.txt",3,True)

Set WshShell = Nothing
Set fso = Nothing

i think it's easy enough to do what you want ... although i don't know how best to trigger the restart from vbscript - you can probably call an external exe which calls for the restart.

how do you want ot do the other modifications? by adding command line switches? message boxes? direct coding?

Many thanks for taking the time to reply, command line switches would be fine...Thanks

If this helps a shortcut created with this command line [ C:\WINDOWS\system32\shutdown.exe -r ] reboots the PC in XP if that can be incorporated into the script..great!