Run existing Powershell Script without specifying package
"Run PowerShell Script" task sequence step needs a way to specify an existing script to run without needing to specify a package. For example, I already have working powershell scripts in my sms10000 folder. I should be able to specify %_SMSTSMDataPath%\SMS10000\somescript.ps1 as the script. That way scripts written to reference $PSScriptRoot, load powershell modules, reference relative paths, etc... will behave as expected.