Hi Mark,
Unfortunately, there's no easy way to unlock sequences. However, that doesn't mean that you don't have access to the sequence any longer. For instance from Authoring, you can always open the sequence and then save it as another copy. And from Monitor you can run this sequence with as many classes as you want.
Locking of sequences is a bit of a pain, but this issue is now address in the upcoming version. Have a look at this posting for further details.
Thanks,
Ernie
Posted by Ernie Ghiglione