i was developing my own batch file.... and I made it! incredible...
the only question is... the field "type" affect only in which category of plugin my batch file is inserted, isn't it? 'cause i combined different types of .dll files (info, posters...) and it worked!
EDIT: too much enthusiasm... the batch file works, it upgrades my movie info and poster correctly at once (from imdb and filmup) but, don't know why, it also creates a duplicate record of the same movie with the info from imdb only... why?