Just playing with ideas from http://technet.microsoft.com/en-us/library/dn249925.aspx

imaginaryAppEnvironment.ps1

$AllNodes = @(
  @{
    NodeName = "*";
    RecurseValue = $true
  },
  @{
    NodeName = "WebServer101";
    Role = "Web";
    RolesToBePresent = "Web-Server";
    SourceRoot = "\\Server106\source\web";
    Version = "1.0";
    WebDirectory = "D:\inetpub\wwwroot";
    RecurseValue = $false;
  },
  @{
    NodeName = "AppServer102";
    Role = "NServiceBus";
    RolesToBePresent = "MSMQ-Server";
    SourceRoot = "\\Server106\source\app";
    Version = "1.0";
    AppDirectory = "D:\Services";
    RecurseValue = $false;
  }
);

Configuration appEnvironment {
  Node $AllNodes.Where("Role -eq Web").NodeName {
    WindowsFeature webServer {
      Ensure = "Present";
      Name = $Node.RolesToBePresent
    }
  }
  Node $AllNodes.Where("Role -eq NServiceBus").NodeName {
    WindowsFeature msmqServer {
        Ensure = "Present"
        Name = $Node.RolesToBePresent
        DependsOn = "[WindowsFeature]msmqDirectory", "[WindowsFeature]msmqTriggers", "[WindowsFeature]msmqHttpSupport", "[WindowsFeature]msmqMulticasting", "[WindowsFeature]msmqRouting", "[WindowsFeature]msmqDcom"
    }
    WindowsFeature msmqDirectory {
        Ensure = "Absent"
        Name = "MSMQ-Directory"
    }
    WindowsFeature msmqTriggers {
        Ensure = "Absent"
        Name = "MSMQ-Triggers"
    }
    WindowsFeature msmqHttpSupport {
        Ensure = "Absent"
        Name = "MSMQ-HTTP-Support"
    }
    WindowsFeature msmqMulticasting {
        Ensure = "Absent"
        Name = "MSMQ-Multicasting"
    }
    WindowsFeature msmqRouting {
        Ensure = "Absent"
        Name = "MSMQ-Routing"
    }
    WindowsFeature msmqDcom {
        Ensure = "Absent"
        Name = "MSMQ-DCOM"
    }
  }
} 
appEnvironment –ConfigurationData $AllNodes