Powershell update Field Value without changing version number

Question

I want to update a value in a field in a list for a lot of list items.
However, this list has major and minor versioning turned on, and an approval process.
When I update the field's value for all the required list items, I don't want the approval process to start and I don't want the version number to change.
How can I do this?
This is my code so far:
$siteUrl = "http://portal"
$listName = "list name"
$field1_Name = "category"
$web = Get-SPWeb -Identity $siteUrl
$list = $web.Lists[$listName]
$items = $list.Items
ForEach ($item in $items)
    if ($item[$field1_Name].ToString() -eq "testing") 
 $url = [String]::Format("{0}/{1}",$web.Url, $item.File.URl)
     $file = $web.GetFile($url)
 $file.CheckOut()
 write-host $item.name
       $item[$field1_Name] = "testing again"
       $item.Update()
 $file.CheckIn("updated category name", [Microsoft.Sharepoint.SPCheckinType]::MajorCheckIn))
$web.Dispose()

Answer 1

Instead of calling $item.Update() call $item.SystemUpdate($false);  That will update the fields without incrementing he version number of the listitem.  Read about it here:
http://msdn.microsoft.com/EN-US/library/office/ms481195(v=office.14).aspx
Paul Stork SharePoint Server MVP
Principal Architect: Blue Chip Consulting Group
Blog: http://dontpapanic.com/blog
Twitter: Follow @pstork
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