Keep it as .CPP, it's workin' allright this way.
just ensure you kept the directory structure of the addon you're tweaking:
Put the cpp in the addon-folder
check the cpp for paths i.e. addonname\soundfiles\Soundfire.ogg
(this is an exemple !)
re-compress the addonfolder to PBO,
&&
back to the game.
I never use Bins, and at the moment my current project CPP is over 100k now...
If you tweak a lot, kill the original CPP that comes with the addon && do yourself a "ConfigFolder" where you put your CPP.
compress it && into your addon folder again: ther you go, it's much faster to compress and put ingame, no need to wait for the entire folder addon to be compacted to pbo again. and again. and again.
This way your sounds are in the game, you only play on the cpp settings MUCH faster.
Well, that's only valid if you're not attempting to tweak the ORIGINAL Bin from the real OFPbin.If it is, sorry I misunderstood your question but the recommandation above can be found usefull to some other people. :tomato:
Cheers
Peacepunk