Being Peter Pig, the models are designed for the rigours (or should I say 'riggers' - ooh, I've punned) of wargaming and are big lumpy beasts. Lovely. The hull is about 2" long.
So, being a bit bigger that the usual naval wargame stuff, I was able to rig the ship with fine piano wire. The wire is drilled and pinned in place so that the finished model is rock solid. The outer shrouds are also piano wire and the ratlines stuck to them are bits insect screen (I'm not bothered about the vertical lines).
I wanted a particular 'look', so I added a sail to the bowsprit, raised the mainmast a little and raked the fore and mizzen masts to give the thing a rakish look (?). The pins at the top of the masts are for flags and improve the otherwise stubby look. That'll do.

Before and after.

E