How can I associate a file type with a powershell script?

Question

I have a very powershell script that works perfectly and does:

Param(
  [string]$fileName
) 

echo \"Woo I opened $fileName\"

When I run it on

Answer 1

I don't think you can do it through Windows UI.

The goal here is to associate a type with powershell.exe, arguments to which will be

1. The powershell script
2. The target filename

To do this

1. Launch Regedit.exe. //disclaimer: you are editing Windows registry. Here be tigers.
2. Go to HKEY_CLASSES_ROOT (admin access, for all users) or HKEY_CURRENT_USER\SOFTWARE\Classes
3. Create a key named ., e.g. if you want to associate *.zbs - create a key .zbs
4. Set it's (default) value to something like zbsfile -- this is a reference linking your extension to a filetype.
5. Create a key called zbsfile - this is your filetype
6. Set (default) value to something readable, e.g. "This file is ZBS."
7. Underneath create a tree of keys (examples are all around):

zbsfile shell open command

8. Under command, set (default) value to e.g.
   powershell.exe -File "C:\path\to your\file.ps1" "%1"
   where %1 means the file user clicked

That should work.

EDIT: or (crazy idea), create a bat file doing just powershell.exe -File "C:\path\to your\file.ps1" "%%1" and select it in Windows UI...