Yes! There are no problem with running "only" two account at the same time. Just open WoW twice, and make a macro so the "alt" follows the "main" charcter.. And use a program du duplicate the main keys to both accounts.

This is just a short description, so you need to read some of the great guids on this forum.

Either in the forum, or the wiki part of this site. Hope this help you a little on your road to becoma a happy multiboxer!

-Calens