On the other hand, if you create a module of your own
$snapin = Get-PSSnapin -Registered WDeploySnapin3.0 Import-Module (Join-Path $snapin.ApplicationBase $snapin.ModuleName) -Verbose Export-ModuleMember -Cmdlet *
Put it in C:\Program Files\WindowsPowerShell\Modules\TestModule (or name it something else) and then
Register-PSSessionConfiguration -Name T -ModulesToImport 'C:\Program Files\WindowsPowerShell\Modules\TestModule'
That at least does seem to work.