As for the WoW accounts, they are completely seperate accounts, but if you're able to put in some time each day, you'll have explored just about all that you can in the trial within the time period.
Usually, when a system asks you to create backup DVDs, they are building a compressed re-install, so it will take less space. (Two DVDs in my experience, but it could conceivably take three.) You want to do this, as it gives you a recovery path if soming bad happens to your hard drive. You don't want to be in the situation of having to ask your manufacturer for discs out of the warranty period--they charge $20-40 to provide them.
Chris
Usually, when a system asks you to create backup DVDs, they are building a compressed re-install, so it will take less space. (Two DVDs in my experience, but it could conceivably take three.) You want to do this, as it gives you a recovery path if soming bad happens to your hard drive. You don't want to be in the situation of having to ask your manufacturer for discs out of the warranty period--they charge $20-40 to provide them.
Chris