Before I get flamed for not searching, I have spent the last 30 minutes trying to find any clues as to whether to use the addon folder in Resistance or the original OPF addon folder. I see that some addons have stated that they are specific to Resistance (like the power glider), but others fail to state that they can work in either. I would just like to clarify this little problem, as OPF is crashing more regularly now that I have Resistance. I have only added one addon into the Resistance addon folder (the glider).
it doesn't matter which u put it in... I put my unoffical addons in operationflashpoint/addons and my offical ones remain in res/addons , just to keep em seperate.