Silly Disk Question

I bought Guild Wars Prophecies from Best Buy. Is it necessary for me to put the disk in every time I play?? I know it is necessary when you first buy it and need to install it.
Thanx

Nope, you just need to install the game once and you can put the CD back in the case.

You shouldn't need the CD except for the original installation, unless there is some data corruption that occurs and you need to reinstall.

Actually, less then that, as long as you know your username/password, you can even use the web installer.

The thing to keep is the cd-key/account creation key so if there is ever a dispute with your account (or it was stolen) you can take it back with Anet support help.