PSJumpStart.ps1xml

<?xml version="1.0" encoding="utf-8" ?>
<Types>
  <Type>
    <Name>System.Collections.Hashtable</Name>
    <Members>
      <ScriptMethod>
        <Name>AppendValue</Name>
        <Script>
                    param(
                       [parameter(Mandatory=$true,Position=0)]
                       [string]$key,
                       [parameter(Mandatory=$true,Position=1)]
                       [object]$data
                    )
            if ($this.ContainsKey($key)) {
                $currentData = $this[$key]
                $this.Remove($key)
            $this.Add($key,@($currentData,$data))
                    } else {
                        $this.Add($key,$data)
                    }
        </Script>
      </ScriptMethod>
      <ScriptMethod>
        <Name>Replace</Name>
        <Script>
                    param(
                       [parameter(Mandatory=$true,Position=0)]
                       [string]$key,
                       [parameter(Mandatory=$true,Position=1)]
                       [object]$data
                    )
            if ($this.ContainsKey($key)) {
                $this.Remove($key)
            }
                      
                $this.Add($key,$data)
        </Script>
      </ScriptMethod>
    </Members>
  </Type>
</Types>