spoke too soon
these style are causing me problems
STAR TREK - TNG - 01 - Ghost Ship_624
which works ok but Id like to be able to remove the '_624'
STAR TREK - DS9 - 01 - Emissary_512
gives me a series entry of 'DS ' rather than series 'DS9 
Im happy with 'Star Trek' as the author as I dont have the author in the filename
Also I have another series that looks like 'Star Wars - _New Jedi Order 01_ - Vector Prime (by R A Salvatore)_937'
gives me a title of
'_New Jedi Order 01_ - Vector Prime (by R A Salvatore)_937' and star wars as the author.
I'd like in this style 'star wars' as a tag and it to pull the author from between the (by **)