Create Powershell script that Changes the MAX Eventlog size

This should be a pretty basic task for someone with powershell experience. REQUIREMENTS: Create a powershell script that uses WMI to change the max eventlog size for Active Directory eventlog. Powershell script should make use of "$cred = Get-Credential username" so that I can specify my credential on the fly. This script will be used to go to the W2008 DC's and change this max value to 4GB limit. MUST USE: Powershell & WMI or WMIC I need to be able to have a list of servers in a text file to target that I will save the server names in. One server name per line....etc, etc.. This is the command that is used to run on a local server with PowerShell to accomplish this; limit-eventLog -logname "Directory Service" -MaximumSize 4194240KB COST/TIME: I'm hoping that I can get this done for about $30... Looking for someone that can start ASAP so that I can have this ready for a project in the A.M. at 8:00 CST.