If you consider reinstalling i suggest that you buy the RESISTANCE addon, it's cheap and adds a ton of new features for addons and missions developers.
For those who dont know the game, it's not only the game as described on the official site that is so exciting, but the amount of addons and missions and custom terrains (13km x 13km or a standard map, or more now), the game is fun on a multiplayer server, but also as a single player game, you can even set up battles and spectate.
And if you ever install for the first time or dont know what addons are about i suggest that you search for the DELTA & RANGERS by Ballistic addons, or SEB Nam Pack version 2 (exciting coops or single player missions in Viet Nam) and visit http://ofp.info/
(browse the addons and watch the screenshots) or http://theavonlady.org/theofpfaq/
you'll see that although it has not too much visibility in the media OFP has one of the most creative communities, not one day without a few more addons
Now, there was more than a rumour about ofp2 ( http://www.operationflashpoint2.com/
) , this has gone official and is really an exciting news... Altho we have to wait at least 1.5 year
BUT i still have OFP meanwhile :))