writing a powershell script to relay commands over two servers - powershell

Question

I have been working on getting a script running that runs from a main domain controller. I want to be able to run the script from this domain controller and have it invoke some commands on a varied amount of remote servers which in turn copies files from a NAS on the same network to a local directory on each server. I use credentials from a securecard that I pass in to elevate privileges but I cannot seem to get it to copy the files down unless I execute the commands on the server itself. If I can get powershell to remotely execute these commands and perform the action then I would be all set.
Here is what I have come up with so far, please let me know what might help get this going for me. I would appreciate any help provided.
# Sets the variable for the source file location (c:\temp\ThisFile.exe)
#$Source = "\\nas\Applications\devapp\autononomous\v2\.exe"
$Source = "c:\temp\redirect"
# Sets the variable for the destination file location
$Destination = "temp"
# Sets the variable for application
$Application = "REDIRECT"
# Sets the variable for the remote destination file location
$Remote_Destination = "c:\$Destination\$Application"
# Sets the variable for the remote command to be executed
$Remote_Command = "regedit /s $Remote_Destination"
# Pass in the credentials you will be using to be able to copy from
one server to another, otherwise it will attempt to use local credentials.
$Credentials = get-credential
# Read in servers from text file and execute script
$Servers = Get-Content c:\temp\PowerShell\Servers.txt | ForEach-Object {
Write-Host "Installing" $Application "on server" $_
Copy-Item -Path $Source -Destination \\$_\c$\$Destination -recurse -force -Credential $Credentials
Invoke-Command -ComputerName $_ -ScriptBlock {
Param($Remote_DestinationR, $Remote_CommandR)
cmd.exe /c if not exist "c:\app\v2" mkdir "C:\app\v2"
cmd.exe /c xcopy /E /I /Y "C:\temp\redirect\home" "C:\app\v2\home"
} -Argumentlist $Remote_Destination, $Remote_Command
}