Recreating default display, edit and new forms of a list in SharePoint 2010 using Powershell

Following script recreates dispform.aspx, editform.aspx and newform.aspx of a list using PowerShell, useful in scenarios where we need to recreate these forms to fix issues induced due to upgrades

$url = Read-Host "Enter URL" 

do{
$listname = Read-Host "Enter List Name"
$web = get-spweb $url 
$list = $web.lists[$listname]

#---------------------------- Delete Forms ----------------------

$form1 = $list.RootFolder.files | ?{$_.url -match "dispform.aspx"}

$form2 = $list.RootFolder.files | ?{$_.url -match "editform.aspx"}

$form3 = $list.RootFolder.files | ?{$_.url -match "newform.aspx"}

$form2.delete()
$form1.delete()
$form3.delete()

$list.update()

# --------------------------recreating --------------------------------

$editformurl = $list.RootFolder.ServerRelativeUrl + "/editform.aspx"
$dispformurl = $list.RootFolder.ServerRelativeUrl + "/Dispform.aspx"
$newformurl = $list.RootFolder.ServerRelativeUrl + "/NewForm.aspx"

$dispform = $files.add($dispformurl, [Microsoft.SharePoint.SPTemplateFileType]::FormPage)
$editform = $files.add($editformurl, [Microsoft.SharePoint.SPTemplateFileType]::FormPage)
$newform = $files.add($newformurl, [Microsoft.SharePoint.SPTemplateFileType]::FormPage)

$wpm = $editform.GetLimitedWebPartManager([System.Web.UI.WebControls.WebParts.PersonalizationScope]::Shared)
$wpm2 = $dispform.GetLimitedWebPartManager([System.Web.UI.WebControls.WebParts.PersonalizationScope]::Shared)
$wpm3 = $newform.GetLimitedWebPartManager([System.Web.UI.WebControls.WebParts.PersonalizationScope]::Shared)

$lfw1 = new-object ([Microsoft.SharePoint.WebPartPages.ListFormwebpart])
$lfw2 = new-object ([Microsoft.SharePoint.WebPartPages.ListFormwebpart])
$lfw3 = new-object ([Microsoft.SharePoint.WebPartPages.ListFormwebpart])

$ilist1 = [Microsoft.SharePoint.WebPartPages.IListWebPart]($lfw1)
$ilist2 = [Microsoft.SharePoint.WebPartPages.IListWebPart]($lfw2)
$ilist3 = [Microsoft.SharePoint.WebPartPages.IListWebPart]($lfw3)

$ilist1.ListId = $list.id
$ilist1.PageType = [Microsoft.SharePoint.PAGETYPE]::PAGE_EDITFORM;

$ilist2.ListId = $list.id
$ilist2.PageType = [Microsoft.SharePoint.PAGETYPE]::PAGE_DISPLAYFORM;

$ilist3.ListId = $list.id
$ilist3.PageType = [Microsoft.SharePoint.PAGETYPE]::PAGE_NEWFORM;

$wpm.AddWebPart($lfw1, "Main", 1)
$wpm2.AddWebPart($lfw2, "Main", 1) 
$wpm3.AddWebPart($lfw3, "Main", 1)


$list.DefaultDisplayFormUrl = $dispformurl
$list.DefaultEditFormUrl = $editformurl 
$list.DefaultNewFormUrl = $newformurl

$list.update()
}
while ($TRUE)
# # ===================