Yes! It is possible to use Content Crooner even if you have accounts at other article directories. The best thing to do in your case is to set up all your accounts at ezinearticles.com, goarticles.com, etc. to match your pen name account information at Content Crooner.
Use the following instructions to take advantage of Content Crooner:
First, update your login credentials at the article directories to match your Content Crooner pen name credentials. This is done by going to your accounts at article directories and updating the pen name, email address, username, and password to match that of your pen name account at Content Crooner.
Second, submit articles to Content Crooner for distribution.
Third, the Content Crooner distribution system will automatically login to the existing accounts at the article directories to distribute the new articles. If you do not happen to have an account at a particular article directory, then Content Crooner will create new accounts at these new sites with your current author information. However, as a word of caution, some sites such as EzineArticles only allow one person to have a specific pen name. If the pen name is already taken, then Content Crooner cannot create a new account for the author.
Therefore, please log into your accounts and update your credentials to match your Content Crooner credentials and you'll be all set. Your future articles will be posted to all your existing accounts at the article directories on the Content Crooner distribution list!