I got Arma 2 but not CO if i get arrowhead will it still work

[I got Arma 2 but not CO if i get arrowhead will it still work]

yes it will work just fine

ok cheers is that what you did got arma 2 and then went and got arrowhead?

[I got Arma 2 but not CO if i get arrowhead will it still work]

So I got arma 2 quite a while ago but I didn't buy any of the other packs like arma 2 CO or operation arrowhead.

I bought arma 2 alone. If I went a got operation arrowhead will dayz still work or will i need to go and buy arma 2 CO?

It would mean alot if you could get back to me on this soon cheers:D