Hello and Welcome back to Trinity!
Hmm, as far as your characters go you could try to copy them over into the localvault, but I'm not sure that you'd be able to use them on the server side of things. I guess try it and see how it goes.
I'm pretty sure that Brian (or someone) will need to go to a server back up and see if he can find your characters under that SweenyTodd69 account name. How long ago are we talking about here? Do you remember when you played last?
I wish I could help you out more, but I'm just going off of memory of things that I've heard. I've never had to do this myself, so please forgive me if I am not correct.
I wish you luck and hope that things work out for ya. Hopefully, I'll see you in game.