Here is what I have so far... All seems to work during minor testing. Still need to test this on multiple clients and servers to verify functionality.

code:
BREAK ON
CALL "OSVER.KIX"
$MCAFEE = READVALUE("HKEY_LOCAL_MACHINE\SOFTWARE\McAfee\virusscan","szVirDefVer")
$PATTERN = READVALUE("HKEY_LOCAL_MACHINE\SOFTWARE\Intel\LANDesk\VirusProtect6\CurrentVersion","CurrentPatternName")
$PARENT = READVALUE("HKEY_LOCAL_MACHINE\SOFTWARE\Intel\LANDesk\VirusProtect6\CurrentVersion","Parent")
$SCANENGINE = READVALUE("HKEY_LOCAL_MACHINE\SOFTWARE\Intel\LANDesk\VirusProtect6\CurrentVersion","ScanEngineVersion")
$SCANDEFS = READVALUE("HKEY_LOCAL_MACHINE\SOFTWARE\Symantec\SharedDefs","NAVCORP_70")
$comment9x = READVALUE("HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\VxD\VNETSUP", "Comment")
$commentNT = READVALUE("HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters","srvcomment")
$PROFILE = "C:\SCRIPTS\NAVSUP.INI"
$SECTION = "NAVSUPPORT"
$CR = CHR(10)
$LIST = READPROFILESTRING($PROFILE, $SECTION, "" )
$RC = ""
$RC = READVALUE("HKEY_LOCAL_MACHINE\SOFTWARE\Symantec\SharedDefs","NAVCORP_70")
$RC = SUBSTR($RC,INSTR($RC,".")-8,8)
IF (EXISTKEY("HKEY_LOCAL_MACHINE\SOFTWARE\Symantec\NAVMSE") = 0) ;System is running NAV on an Exchange Server
	RETURN
	QUIT
ENDIF
IF $RC = ""
	GOTO ALERT2
	GOTO LOGS
ENDIF
IF ((((@year-2000)*365)+@ydayno)-(((val(SUBSTR($RC,1,4))-2000)*365)+((val(SUBSTR($RC,5,2))-1)*30)+val(SUBSTR($RC,7,2))))>90
	GOSUB ALERT1
	GOTO LOGS
ENDIF
GOTO LOGS
:ALERT1
WHILE INSTR ($LIST, $CR) <> 0
 $NAVSUP = SUBSTR($LIST,1,INSTR($LIST,$CR)-1)
	SHELL '%COMSPEC% /C NET SEND "$NAVSUP" "NOTICE: @USERID (@FULLNAME) logged on to @WKSTA with an IP of @IPADDRESS0.  This workstation has VIRUS definition files dated $RC which are over 90 days old.  Please help @FULLNAME update the AntiVirus on this system"'
 $LIST = SUBSTR($LIST,INSTR($LIST,$CR)+1,LEN($LIST)-INSTR($LIST,$CR))
LOOP
RETURN
:ALERT2
WHILE INSTR ($LIST, $CR) <> 0
 $NAVSUP = SUBSTR($LIST,1,INSTR($LIST,$CR)-1)
	SHELL '%COMSPEC% /C NET SEND "$NAVSUP" "WARNING: @USERID (@FULLNAME) logged on to @WKSTA with an IP of @IPADDRESS0.  This workstation has NO AntiVirus installed.  Please install immediately"'
 $LIST = SUBSTR($LIST,INSTR($LIST,$CR)+1,LEN($LIST)-INSTR($LIST,$CR))
LOOP
RETURN

:LOGS
$LOGSRV = WDID02
IF @INWIN = 1		; WinNT
		IF EXIST ("\\"+$logsrv+"\LOGS\DIALIN\LAN\"+@WKSTA+"."+@ADDRESS+".LOG")
			DEL ("\\"+$logsrv+"\LOGS\DIALIN\LAN\"+@WKSTA+"."+@ADDRESS+".LOG")
		ENDIF
		IF OPEN(1,"\\"+$logsrv+"\LOGS\DIALIN\LAN\"+@WKSTA+"."+@ADDRESS+".LOG", 5)= 0
			$out = WriteLine(1, @DATE+"*"+@TIME+"*"+@USERID+"*"+@COMMENT+"*"+$commentNT+"*"+@FULLNAME+"*"+@lserver+"*"+@HOMEDIR+"*"+@HOSTNAME+"*"+@IPADDRESS0+"*"+@ADDRESS+"*"+@WKSTA+"*McAfee DEF*"+$MCAFEE+"*NAV Eng*"+$SCANENGINE+"*NAV7 DEF*"+$PATTERN+"*NAV7 Parenet Server*"+$PARENT+"*"+$os+"*"+$SCANDEFS+"*"+Chr(13)+Chr(10))
			$nul = CLOSE(1)
		ENDIF
ELSE
		IF EXIST ("\\"+$logsrv+"\LOGS\DIALIN\LAN\"+@WKSTA+"."+@ADDRESS+".LOG")
			DEL ("\\"+$logsrv+"\LOGS\DIALIN\LAN\"+@WKSTA+"."+@ADDRESS+".LOG")
		ENDIF
		IF OPEN(5,"\\"+$logsrv+"\LOGS\DIALIN\LAN\"+@WKSTA+"."+@ADDRESS+".LOG", 5)= 0
			$out = WriteLine(5, @DATE+"*"+@TIME+"*"+@USERID+"*"+@COMMENT+"*"+$comment9x+"*"+@FULLNAME+"*"+@lserver+"*"+@HOMEDIR+"*"+@HOSTNAME+"*"+@IPADDRESS0+"*"+@ADDRESS+"*"+@WKSTA+"*McAfee DEF*"+$MCAFEE+"*NAV Eng*"+$SCANENGINE+"*NAV7 DEF*"+$PATTERN+"*NAV7 Parenet Server*"+$PARENT+"*"+$os+"*"+$SCANDEFS+"*"+Chr(13)+Chr(10))
			$nul = CLOSE(5)
		ENDIF
ENDIF
RETURN

Special thanks to Lonkero, and Kyder for helping me with the String Manipulation portions of the code.

I also had the format of the NAVSUP.INI wrong.
I left off the NAME=USER1 and only had the NAME portion without the =

Does anyone see any potential problems or further suggestions to improve this?

Bill, please post further info on the POSTIE.EXE you are talking about. I just don't want to open an ANONYMOUS mailer for people...