How to create a desktop shortcut for an existing sandbox as Administrator?

I'm using Sandboxie to get to run Steam with two sessions on the same computer.

I created a specific sandbox called "Steam" inside Sandboxie.

And Steam works very well if I:

  1. Right-click on the current Steam desktop shortcut
  2. Click to run it in a sandbox
  3. Choose the Steam sandbox
  4. Check the Run as Admin box
  5. Click on ok
  6. After this, Steam opens, but every time Steam is asking for the user password, even with the "Remeber" option marked.

 

How could I have a single desktop shortcut with all the steps above (and keeping the current user's password)?