Here is an updated script with some comments
Hope this helps.

 
If Not @LogonMode
Break On
Else
Break Off
EndIf
Dim $SO
$SO=SetOption('Explicit','On')
$SO=SetOption('NoVarsInStrings','On')
$SO=SetOption('NoMacrosInStrings','On')
$SO=SetOption('WrapAtEOL','On')


Dim $Nul


;NOTE: SETTIME (unless it's an application written by you) is an invalid
;command. For the old NT systems there was NET TIME
;but even that - the user needs to be a local admin or the command would fail
;On 2000/2003 Active Directory it is no longer used as they now use W32Time
;SETTIME is a function in C++ from what I can tell
;How to configure an authoritative time server in Windows Server 2003
;http://support.microsoft.com/kb/816042

SETTIME '\\AL-WINSLOW'

; *********************** COMMON NETWORK DRIVE MAPPING FOR ALL USERS **************

;Not really sure why you delete and re-map each logon but hey... to each his own
;Probably better to add the persistent switch as well
USE Y: /delete /persistent
USE Y: '\\AL-WINSLOW\SHARE'
USE S: /delete /persistent
USE S: '\\AL-WINSLOW\SHARE'
USE P: /delete /persistent
USE P: '\\AL-WINSLOW\AUTOLENDERS'
USE O: /delete /persistent
USE O: '\\AL-WINSLOW\HPSCAN'


; ************************END OF DRIVE MAPPING FOR ALL USERS***********************

; ************************DRIVE MAPPING FOR BUSINESS GROUPS************************

;Not required but recommend adding the specific Domain or if single Domain then
;just the @Domain macro
If InGroup(@Domain+'\WISETRACK')
use M: '\\VOORHEES-SERVER\PUBLIC'
use U: '\\SERVER_SOUTH\SHARE'
use K: '\\SERVER_NORTH\SHARE'
use L: '\\LAKEWOOD-SERVER\SHARE'
EndIf

If InGroup (@Domain+'\HP4250-RECON')
$Nul = AddPrinterConnection('\\AL-WINSLOW\HP-4250-RECON')
;SetDefaultPrinter ('\\AL-WINSLOW\HP-4250-RECON')
EndIf

If InGroup (@Domain+'\OKIC5200-RECON')
$Nul = AddPrinterConnection('\\AL-WINSLOW\OKI-C5200N-RECON')
EndIf

If InGroup (@Domain+'\HP4345-ADMIN')
$Nul = AddPrinterConnection('\\AL-WINSLOW\HP-4345MFP-2NDFLOOR')
EndIf

If InGroup(@Domain+'\OKIC5200-SERVICE1')
$Nul = AddPrinterConnection('\\al-winslow\OKI-C5200N-SERVICE1')
EndIf

If InGroup(@Domain+'\OKIC5200-SERVICE2')
$Nul = AddPrinterConnection('\\al-winslow\oki-c5200n-service2')
EndIf

If InGroup(@Domain+'\DELLW5300-INVENTORY')
$Nul = AddPrinterConnection('\\AL-WINSLOW\DELL-W5300-INVENTORY')
;SetDefaultPrinter ('\\AL-WINSLOW\DELL-W5300-INVENTORY')
EndIf

If InGroup(@Domain+'\all_prn')
$Nul = AddPrinterConnection('\\al-winslow\DELL-W5300-INVENTORY')
$Nul = AddPrinterConnection('\\AL-WINSLOW\OKI-C5200N-SERVICE1')
$Nul = AddPrinterConnection('\\AL-WINSLOW\OKI-C5200N-SERVICE2')
$Nul = AddPrinterConnection('\\AL-WINSLOW\HP-4345MFP-2NDFLOOR')
$Nul = AddPrinterConnection('\\AL-WINSLOW\OKI-C5200N-RECON')
$Nul = AddPrinterConnection('\\AL-WINSLOW\HP-4250-RECON')
EndIf


; ************************************************ END ****************************

Exit 1