This is necessary if you want to load .net assemblies (like compiled PowerShell snapins/modules) from a network share! Without setting up your CasPol settings you can neither load a snapin, import a module, or use Assembly.LoadFrom
By reflecting on a snap-in assembly, Cmdlet Help Editor creates customized barebones documentation that includes the cmdlets, parameters, and attributes ... enabling you to create help topics for Windows PowerShell cmdlets in the correct XML format...