Question about the shortcut for GW

I can't remember what exactly I put in the target box for this, but what it does is the game will download ALL the files, even the ones that normally only download in-game. It's something like

"C:\Games\Guild Wars\Gw.exe" -update

But I dunno exactly what I need to type out. If anyone can figure out what I mean and help me out I'd greatly appreciate it.

it is -image

THAT'S what it was. Thank you~!