Another problem is that the search engine apparently does not accept unit numbers in the English language style. A search for "7th" will not bring up anything on either the 7th Foot or the 7th Portuguese Infantry Regiment, you need the Portuguese number style, vizt "7[little o], etc. and I have not figured out how to do this on my keyboard. A search for "7" plus "fuzileiros" or "regimento de infantaria" does not seem to work.
On the other hand, a search for "ordens do dia" turned up some very interesting things including a collection of Beresford's dispatches relating to actions fought by the Portuguese army and the daily orders (in French) for Junot's corps in July 1810, clearly a captured document.
All in all, despite the problems, this is an excellent source for research into an army that is too often overlooked.
DE Graves