Ways of passing property values to Powershell

I'm currently using the Guest Operations wrapper scripts for all my powershell interactions, and if I need to pass values to the Powershell script I use the search and replace options within these workflows to replace values in the script with property values. This works fine but feels clunky. Is there a more elegant way of doing this?

I like the Guest Operations Wrapper scripts as it allows me to track the progress of the script as well as error codes so want to keep using this method