i know from having seen this in use that an addons exists (or did) that lets your main toon drag an alt along to expedite leveling but cannot find it by viewing descriptions.   If anyone knows the name of this addon or where it can be found I would be greatly appreciative of the info...

You are taling about boxing. You need to have more than one account to be able to run multiple toons at one time. That means paying for more than one subscription per month. If, indeed, that is what you are talking about then so a google search for 'boxing', 'multiboxing', etc... If you are asking if you can be logged into more than one character per account the answer is no, no way, not possible, no matter what you think you have seen or been told.

thanks for the info, wasn't sure about 'how' it was done, just knew it could be...