none of those are for v 2.27.6 tho. Can i still play them?
Usually it's possible to enjoy offline missions that were written for previous versions of Aces High. It depends on how much time and how many revisions intervene between the time the mission was written and the time your version of Aces High was published.
The best way to enjoy the big, complex, offline missions is to download old Aces High version 2.12.4, because the "bot" planes fly much better combat tactics. Every one of my missions is originally compiled and optimized for that version.
However, almost all of my missions were recompiled in November of 2011, using version 2.26.3, and I routinely use them with later versions of Aces High. The "bot" aircraft fly low, slow, lazy, uninspired tactics, but if you don't mind flying against that kind of relaxed opposition, the odds are very high that those versions will work for you. The computer and graphics card you use will also be a factor, since some of these missions are very complex and may demand more CPU or more memory than your hardware can deliver. The only way to know for sure is to try them. If I were you, I'd start with "Peabody Simple", using the version that is compiled for Aces High 2.26.3, and following the installation instructions that are associated with that edition. Follow the "AH2.26.3" link from this page:
http://techvideoreview.com/FlightSimMovies/AcesHigh/Ah2Missions/PeabodySimple/PeabodySimpleMissionPage01Full.htmA couple of months ago, I compiled my "Shubin at Guadalcanal" mission for Aces High V2.27.2, and (since that version differs so little from the one you are currently using) it's EXTREMELY likely to work the same for you as it has for others using 2.27.2.
I hope this helps.