How do I execute a PowerShell Script

I've googled this, and found arguments as to "why would you do that, blah blah blah"

So please don't ask me why; this is just the way I was told to do it until we can get our SQL DB Mail working. Our shellscript is the one sending the e-mails for now. Thank you.

...

Okay, so my trigger needs to execute a PowerShell Script (.PS1) that I wrote. Do I just give it a filepath or something?

EXEC xp_cmdshell 'powershell.exe -file “C:\files\testrun.ps1"' 

Any help is appreciated.

-Nothing to see. Move along.