I think there's some confusion over vocabulary here. There's good reason for it to be confusing; it's not entirely rational.
A frigate, as the term was defined in the eighteenth and early nineteenth centuries, had its main armament on one, full-length deck, variously called either the gundeck or the maindeck. The typical first-generation British frigate, in the mid-eighteenth century, had, in addition to that deck, a raised forecastle deck and quarterdeck, leaving the maindeck/gundeck exposed in the waist.
It wasn't long before somebody figured out that everybody's life would be simpler if it were possible to walk directly from the forecastle to the quarterdeck, and vice-versa. So frigates started to be fitted with narrow wood "gangways" connecting the two raised decks. When I was working on my model of the Hancock I made a mighty effort to figure out just how the gangway evolved; I became convinced that it developed inconsistently. There was a period, about the time of the American Revolution (i.e., when the real H.M.S. Rose was in service), when some frigates had no gangways, some had gangways that were only a couple of feet wide, and some had wider ones. (I base that statement on having looked at quite a few contemporary frigate models in the National Maritime Museum.) Generally - but not always - the gangways during that period were portable; some Admiralty draughts from the 1760s and 1770s have platforms jutting out from the quarterdeck and forecastle labeled "fixed part of the gangway."
As time went on, the gangways got wider - not only in frigates but in larger vessels as well. And the gangways came to be permanent fixtures. They in fact became, to all intents and purposes, extensions of the planking of the quarterdeck and forecastle deck. H.M.S. Victory, for instance, is generally said to have a separate, raised quarterdeck and forecastle, connected by permanent gangways.
Eventually the gangways got so wide that the space between them, through which the main deck/gundeck was visible, amounted to an oversized, elongated hatch. (Example: the U.S.S. Constitution.) At about that time, people started referring to the whole "assembly" of forecastle deck, gangways, and quarterdeck as simply the "spar deck." Literature about the Constitution generally refers to the full-length deck with the main armament on it as the "gundeck," and the uppermost deck as the "spar deck." When somebody on board that ship talks about the "forecastle" or the "quarterdeck," he's talking about the forward or after section of the spar deck.
The Lindberg "Jolly Roger" is a reissue of an old kit representing a French frigate, La Flore. I haven't seen the kit in a long time, but as I remember it has what amounts to a spar deck - a single piece of plastic that stretches from bow to stern, with a big opening in it through which the gundeck can be seen. As I recall, the gangways (or, if you like, the central section of the spar deck) are fairly wide strips of "planking" with gratings molded in them. (I think that's a fairly distinctively French feature. I can't recall seeing a British or American frigate with gangways built like that.)
The replica of H.M.S. Rose (the one used in the movie) was built with a (sort of) spar deck - one that doesn't look anything like anything on a real eighteenth-century frigate. Rather than a separate raised quarterdeck and forecastle, she has a simple, full-length deck, with no big hatch in the middle (at least that's how I remember her), stretching from the bow to the stern and completely covering the main deck/gundeck. To put it another way, the space between the forecastle deck and the quarterdeck was planked over. (The explanation for this obvious deviation from historical accuracy was that it "enabled us to make better use of the ship.")
I haven't seen the Admiralty draught of the real H.M.S. Surprise (there actually was a frigate of that name, though the Patrick O'Brian buffs think he modified her a little in his imagination), so I don't know just what the configuration of her decks was. It's a fairly safe bet, though, that she had a separate quarterdeck and forecastle deck, with either temporary or (more likely) permanent gangways connecting them - and a big open space in the middle where the main deck was exposed to the weather.
I'd have to take a look at the Lindberg kit again to make an intelligent recommendation, but one possible approach would be to cut off the gangways, thereby leaving the forecastle deck and quarterdeck separate. That wouldn't make the model look like the ship in the movie - but might make it look more like the real Surprise. To make the kit look more like the ship in the movie, you'd have to fill in the space between the gangways - and thereby make the result look unlike an eighteenth-century frigate. All of which constitutes one of the many reasons why I haven't been attracted by the proposition of building a model of the ship in the movie.
Hope that helps a little. Good luck.