(Just a general note before you read this, I'm not 100% sure of the advice I'm going to give, so be weary.)
Why don't you load the dll into Olly?
If you're using your method, as far as I'm aware that's fine, but when it comes to dumping it, isn't the base addresses automatically put there? As for the tables, are you on about the reconstruction of the import tables, if so I'd use Imprec (Import reconstructor) to do that.