She's looking pretty good there, mate!Here's what I've managed so far. I can't create a new ship model, so this is nothing more than the model for "RN_FirstRate" or "FR_FirstRate" with a Spanish dark red colour scheme, and with new stern art made from a combination of the Alicante ship and the model shown in one of the photos I posted.
So then I think @Jack Rackham could see about potentially adding a few more cannons to that same model using the TOOL if and when he has time.That will have to do unless someone creates a version of "FR_FirstRate" with more guns, which could represent both the Santisima Trinidad before her quarterdeck was extended to become a full fourth gun deck, and the French Océan class, both of which had more cannons than the 104 currently assigned to all "XX_FirstRate" models. In particular, Santisima Trinidad should have four stern cannons, and probably so should the Océan.