How to Update GW without running the game?

I used to remember how to do it, what is the command you have to put into the GW shortcut to have it update the game without starting it?
Thanks in advance!

-image

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thanks alot!

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for those that may need a more detailed explanation:

Every now and then, people have had their hard drives crash and had to reload GW. A regular load does not load all the maps, so when you enter an area for the first time since the reload, it takes awhile for the area maps to download. To avoid this, you can reload the entire game - maps and all, - by taking the following steps:

- right click on your GW program icon and make a shortcut.
- right-click on this shortcut and bring up Properties
- in the Target box, do not erase what is there, but after it, type:
<space>-image
(type in an actual space, not the word <space>)
- close out the properties box, and then double click on the shortcut icon. The entire game will start downloading. this will take a long time (maybe a few hours), so do it when you aren't going to want to play right away - like before you go to bed. It will save you the frustration of having to wait a long time each time you enter a new area.

-image will only download what you need, however, so if it's just a matter of wanting to update the game ('cos you heard there was a patch, perhaps, but don't want to play right away), the wait won't be long.

No, the client normally downloads only what you need to play in the area you are in. -image will download everything that is left to download to fully update your gw.dat.

Also, to add on to Rosie, you can stop it midway and resume at another time without losing all that much progress. Remember to remove the -image command line before you start playing.

-image will actually pre load all maps actually saving the loading times for places you have not visited yet as well as any updated code - eg decorated towns for an event.
If you want to test its easier with gw installed clean then visit a place say uw - note the long load then do -image and then revisit and you will see a big difference.

i always run -image after updates so my dat file is constantly up to date.
Also i have a weekly backup of the gw.dat file just incase mine gets an error and i just replace it rather than having to redo a full -image file.

Yes, I know. But, to me, the previous post wasn't being clear - seemed to say that -image would download the entire thing, including the stuff you already had, not just the data you didn't already have (ie, the stuff you still need).