generate normal password for ad users from csv

hey guys , 

im trying to reset ad users from a csv file and i found numerous powershell scripts about it and it works great

but the problem is the generated password are too heave for example 

"6{_@?79v" and " ug+[HiT; " ... 

[CmdletBinding(SupportsShouldProcess=$true,
					ConfirmImpact="High",
					DefaultParameterSetName="OU")]
	param
	(
		[Parameter(Mandatory=$true,Position=0,ParameterSetName="Path")]
		[String]$Path,
		[Parameter(Mandatory=$True,Position=0,ParameterSetName="OU")]
		[String[]]$OrganizationalUnit,
		[Parameter(Mandatory=$false,Position=1,ParameterSetName="OU")]
		[String]$Password,
		[Parameter(Mandatory=$false,Position=2,ParameterSetName="OU")]
		[switch]$Recurse,
		[Parameter(Mandatory=$false,Position=3)]
		[String]$CSVPath="C:\Result$(Get-Date -Format "MMddyyyy").csv"
	)
	process
	{
		Add-Type -Assembly System.Web
		$result=@()
		$OUList=@()
		$UserList=@()
		if ($Pscmdlet.ParameterSetName -eq "Path")
		{
			if (Test-Path $Path)
			{
				$UserList=Import-Csv $path
				$ProgressTitle="Reset password for users specified in $path"
			}
			else
			{
				$errorMsg="Could not find '$path'. Please make sure the path is correct."
				Write-Error -Message $errorMsg
				return
			}
		}
		else
		{
			foreach ($OU in $OrganizationalUnit)
			{
				$OUList+=Get-ADOrganizationalUnit -Filter 'name -like $OU'
			}
			$OUList|select Name,DistinguishedName
			if ($Recurse)
			{
				$SearchScope="Subtree"
				Write-Host "Users' passwords, in these OUs and their sub-ous, will be reset."
				$DNList+=$OUList|ForEach-Object {$_.distinguishedname}
				#Remove duplicate child OU , if exists.
				foreach ($TempOU in $OUList)
				{
					foreach ($DN in $DNList)
					{
						if ($TempOU.DistinguishedName -like "*?$DN")
						{
							$OUList= $OUList -notmatch $TempOU
							#write-verbose
							$verboseMsg = "Duplicate OU:$TempOU is a child OU of $DN."
							Write-Verbose -Message $verboseMsg
							break
						}
					}
				}
			}
			else
			{
				$SearchScope="Onelevel"
				Write-Host "Users' passwords, in these OUs above, will be reset."
			}
			foreach ($TempOU in $OUList)
			{
				$UserList+=Get-Aduser -Filter 'enabled -eq $true' -ResultSetSize $null -SearchBase $TempOU -SearchScope $SearchScope -Properties samaccountname
			}
			$ProgressTitle="Reset password for users in given OUs"
		}
		if($PSCmdlet.ShouldProcess("these users"))
		{
			foreach ($user in $UserList)
			{
				$Identity=$user.SamAccountName
				if ([System.String]::IsNullOrEmpty($Password))
				{
					if ([System.String]::IsNullOrEmpty($user.Password))
					{
						#generate a password with 10 character
						$NewPassword=[Web.Security.Membership]::GeneratePassword(10,3)
					}
					else
					{
						$NewPassword=$user.Password
					}
				}
				else
				{
					$NewPassword=$Password
				}
				#write progress
				$Counter++
				Write-Progress -Activity $ProgressTitle -Status "Processing" -CurrentOperation $Identity -PercentComplete ($counter / ($Userlist.Count) * 100)
				#reset password
				Set-AdaccountPassword -Identity $Identity -Reset -NewPassword (ConvertTo-SecureString -AsPlainText $NewPassword -Force)
				#export a csv file
				$Account = New-Object PSObject
				$Account | Add-Member -MemberType NoteProperty -Name "Identity" -Value $Identity
				$Account | Add-Member -MemberType NoteProperty -Name "NewPassword" -Value $NewPassword
				$result+=$Account
			}
			$result|Export-Csv -Path $CSVPath -NoTypeInformation -Force
		}
	}
}

i got this one from technet ... how can i make it generate just normal passwords alphanumeric just lowercase letters and numbers ?

RM