The recently posted Iberia flightplans (iberia_fleet.zip) come as a single file, Iberia Fleet.aceThis is not a standard format, so what program/add-on are the 600-or-so people who downloaded it using to extract the plans ?

You can use WinAce to extract these. Or a quicker way is to just rename it from .ace to .zip and extract. This is what I did and it worked fine.

.ACE is very much a standard format.In fact, WinAce is in many ways a superior product to Winzip; it provides much better (smaller) compression. WinAce can handle a variety of compression formats; including Winzip.You can download WinAce at http://www.winace.com/ or you can try Brandon's suggestion.

Thanks !