Problem:  I want my systems tattooed with my company name, because its cool.
Solution:  OEM System information branding is something we see all the time. My opinion is that this, combined with a corporate lock screen are two of the better ways to brand your onsite computers, visually. I recently converted my old batch file for doing this to a powershell script.
The first function creates the folder c:\windows\oem.  Personally I think this is a good place to store your oem picture, but you could create a folder anywhere, the choice is yours.  Next we copy our OEM Picture into that folder we just created (this must meet specific size, height and width requirements) and finally we set the registry options available to us.
The options are outlined pretty well here: 
http://technet.microsoft.com/en-us/library/cc749153(v=ws.10).aspx
This script can be added to MDT as an application or in a task sequence as a PowerShell step. The choice is yours.
Finished product?
oem
And clicking the “Online Support” link takes me to www.deploymentshare.com.

<#
Script to create your OEM folder and set Branding Tattoo Options
Author:  Jonathan of www.deploymentshare.com
Version: 1.0.0
Notes:
1. Change the middle function to point to your OEM Picture location
2. Your OEM Picture must meet the requirements of size
#>
Function Create-OEMFolder
	{
		$Destination = "C:\Windows\OEM"
		if (!(Test-Path -path $Destination )) { $null = New-Item -ItemType Container -Path $Destination -Force }
		Copy-Item .\OEM.bmp $Destination -Force
	}
Function Copy-PicturetoLocation
    {
    $Source = #SET YOUR PICTURE SOURCE LOCATION HERE
    $Destination = "C:\Windows\OEM\"
    Robocopy $Source $Destination
    }
Function Set-OEMBranding
    {
        $OEMKey = "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\OEMInformation"
        Set-ItemProperty -Path $OEMKey -Name "Model" -Value (Get-WmiObject -Class Win32_ComputerSystem).Model
        Set-ItemProperty -Path $OEMKey -Name "HelpCustomized" -Value 00000000
        Set-ItemProperty -Path $OEMKey -Name "SupportHours" -Value "Here at www.deploymentshare.com we are always open"
        Set-ItemProperty -Path $OEMKey -Name "Logo" -Value "C:\Windows\OEM\oem.bmp"
        Set-ItemProperty -Path $OEMKey -Name "Manufacturer" -Value "Deploymentshare.com"
        Set-ItemProperty -Path $OEMKey -Name "SupportPhone" -Value "0123 456 78910"
        Set-ItemProperty -Path $OEMKey -Name "SupportURL" -Value "http://www.deploymentshare.com"
    }
Create-OEMFolder
Copy-PicturetoLocation
Set-OEMBranding

 
Enjoy,
Jonathan