Ok, I got it. This is how it's done.

I want to thank everyone for trying to help me out. SSC FTW!!!!

$ServerName = "MilanoMosh"

$ConfigFile = "C:\MyFile.dtsConfig"

function Edit-XmlNodes {

param (

[xml] $doc = $(throw "doc is a required parameter"),

[string] $xpath = $(throw "xpath is a required parameter"),

[string] $value = $(throw "value is a required parameter"),

[bool] $condition = $true

)

if ($condition -eq $true) {

$nodes = $doc.SelectNodes($xpath)

foreach ($node in $nodes) {

if ($node -ne $null) {

if ($node.NodeType -eq "Element") {

$node.InnerXml = $value

}

else {

$node.Value = $value

}

}

}

}

}

$xml = [xml](Get-Content $ConfigFile)

# <file><foo attribute="bar" attribute2="bar" attribute3="bar" /></file>

Edit-XmlNodes $xml -xpath "/DTSConfiguration/Configuration/ConfiguredValue " -value $ServerName

$xml.save($ConfigFile)

# <file><foo attribute="new value" attribute2="bar" attribute3="bar" /></file>