Purge unused Exchange 2007 Transaction Logs

My company is migrating from Exchange 2000 to Exchange 2007.  Our E2000 server contains roughly 90 Gig worth of Public Folder, Mail, & Calendar data.  While simulating the migration in a Virtual Server environment I discovered that E2007 was generating a lot of transaction log files.  I wrote this PowerShell script to purge the unneeded log files.  At any given moment E2007 is using the newest X number of log files that exist.  As a new one is added, the oldest log file in the relevant set becomes unneeded.  I read about this in the following link: http://searchexchange.techtarget.com/tip/0,289483,sid43_gci1187056,00.html. 
 
This code removes all the unneeded log files from the First Storage Group for a default installation of Exchange 2007.

 $temp = (eseutil /mk "C:\Program Files\Microsoft\Exchange Server\Mailbox\First Storage Group\E00.chk")[13]
 $Bottom_Log_File = $temp.remove($temp.IndexOf(",")).remove(0,$temp.IndexOf("x")+1)
 Get-ChildItem "C:\Program Files\Microsoft\Exchange Server\Mailbox\First Storage Group" | Where-Object { $_.Name.Length -eq 15 -AND $_.Name -like "E00*.log" -AND $_.Name.Substring(3+8-$Bottom_Log_File.length,$Bottom_Log_File.length) -lt $Bottom_Log_File } | foreach($_) {remove-item $_.fullname}
 

 
Save it inside "Purge_Exchange_Transaction_Logs.ps1" and use Task Scheduler to run the process as often as necessary.  I run this process every 10 minutes during a massive import and less often when the import/migration is finished.

New to PowerShell and tried your script -- not sure what this meant:

powershell.exe -noexit D:\Purge_Exchange_T_Logs_3rdSGroup_LCR.ps1

Method invocation failed because [System.Object[]] doesn't contain a method named 'IndexOf'.
At D:\BGI\Purge_Exchange_T_Logs_3rdSGroup_LCR.ps1:3 char:75
+ $Bottom_Log_File = $temp.remove($temp.IndexOf(",")).remove(0,$temp.IndexOf( <<<< "x")+1)

Thanks!

My error, bracket missing on the ' [13] ' at the end.

THANKS AGAIN FOR THE GREAT SCRIPT!

i am getting following error in windows power shell... any idea ?
 
Exception calling "Remove" with "1" argument(s): "StartIndex cannot be less tha
n zero.
Parameter name: startIndex"
At C:\Users\abdul.waheed\Desktop\poooooo.ps1:2 char:33
+  $Bottom_Log_File = $temp.remove( <<<< $temp.IndexOf(",")).remove(0,$temp.Ind
exOf("x")+1)
 
 

i have fourth storage group configured. what changes i need to make for that ???

hi guys,,,
nice discussion is going on ,,,,
i really enjoyed it,,,, and also
helpful for me ,,,
it should be helpful for every one,,,
thanks,,,,