-image?

I've been trying to run the -image command line.
However, when I right click and select "properties" on my shortcut, I don't see any "Shortcut" tab.
What do I do?

If you are not seeing the shortcut tab I have a feeling you are right clicking on the exe in the guild wars folder. But anyhow, rightclick on the guild wars icon and create a shortcut or send to desktop as shortcut then you can edit the shortcut. -image

Needs to be a _shortcut_. Make sure it is.

Maybe its just the way he worded it,but when you right click the shortcut you arent looking for a "shortcut" tab its a "Target" box that should have something like
"C:\Program Files\Guild Wars\Gw.exe" in it

Most likely, you have Vista or Win7 and are using the shortcut in the Games folder.
Instead, you want to make an actual GW desktop icon. Use Windows Explorer or My Computer to navigate to the Guild Wars folder. GW is (by default) in either C:\Program Files\Guild Wars or C:\Program Files (x86)\Guild Wars.
In the Guild Wars folder you'll find gw.exe (although the .exe part might not show up). Right-click on gw.exe and select Send To > Desktop (create shortcut). Then you will have a proper shortcut.