3rd disc won't load

The 3rd disc in Nightfall gives me an error message and exits the setup when I tried to install the game. I already have the other 2 Guild Wars games though, so I decided to just enter the CD key and see if it would download what it needed on its own. So far it seems to... I created a Nightfall character and ran her through the 1st 2 towns. It seems to be taking a while to d/l each location as I get to it, then it's fine. Does anyone know if this will cause problems for my game? Should I take the cd's back to the store and trade them for another set, or will it just get what it needs from the servers?

You'll be fine....hold on to the cds just in case.

But, yes, you'll get everything you need from the server.

if you would like to downlaod all you need for the game do this...

close guild wars
edit the shortcut
hit apply after you insert the -image
run the shortcut
it will downlaod all the info and decompress it for you
once it finishes go back into that shortcut and remove the "-image" and apply

now you can run gw without having to dl any maps or decompress them.