Sidewinders won't work (unless you do some real clever scripting) cause they're proxies, and the crappy OFP engine doesn't allow for more than one proxy weapon on each model. So if you want two types of guided weapons (Hellfire and some other type), one will have to be tube-launched (i.e. non-proxy). So the Stingers would work, but the Sidewinders would not.
>all I want to do is create another AH-64, exact same type (inherited >classes) only with the alterations in the previous posting.
Forget it; you need some modelling skills to do that. As I said, the Stinger would have to be non-proxy, i.e. a tube-launched weapon. The tubes are part of the model though, so there's no way to attach them without changing the model.